Clarify regular expression timeout (#7894)

* typos

* note about timeout

* Update xml/System.Text.RegularExpressions/Regex.xml

Co-authored-by: Genevieve Warren <[email protected]>

Co-authored-by: Genevieve Warren <[email protected]>

Author: danmoseley

xml/System.Text.RegularExpressions/CaptureCollection.xml

@@ -1201,7 +1201,7 @@ This member is an explicit interface member implementation. It can be used only
 
 ## Remarks
 
-Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
+Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
  
           ]]></format>
         </remarks>
@@ -1249,7 +1249,7 @@ Starting with the .NET Framework 2.0, this method uses the collection's objects'
 
 ## Remarks
 
-Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
+Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
  
           ]]></format>
         </remarks>

xml/System.Text.RegularExpressions/MatchCollection.xml

@@ -1244,7 +1244,7 @@ This member is an explicit interface member implementation. It can be used only
 
 ## Remarks
 
-Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
+Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
  
           ]]></format>
         </remarks>
@@ -1292,7 +1292,7 @@ Starting with the .NET Framework 2.0, this method uses the collection's objects'
 
 ## Remarks
 
-Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In the earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
+Starting with the .NET Framework 2.0, this method uses the collection's objects' <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods on `item` to determine whether item exists. In earlier versions of the .NET Framework, this determination was made by using the <xref:System.Object.Equals%2A> and <xref:System.IComparable.CompareTo%2A> methods of the `item` parameter on the objects in the collection.   
  
           ]]></format>
         </remarks>