DOCS-15003 fix typos BACKPORT v5.1 (#315)

Author: Dave

source/reference/command/validate.txt

@@ -138,9 +138,10 @@ Restrictions
 MongoDB drivers automatically set :ref:`afterClusterTime
 <afterClusterTime>` for operations associated with :ref:`causally
 consistent sessions <causal-consistency>`. Starting in MongoDB 4.2, the
-:dbcommand:`validate` command no longer support :ref:`afterClusterTime
-<afterClusterTime>`. As such, :dbcommand:`validate` cannot be associatd
-with :ref:`causally consistent sessions <causal-consistency>`.
+:dbcommand:`validate` command no longer supports :ref:`afterClusterTime
+<afterClusterTime>`. As such, :dbcommand:`validate` cannot be
+associated with :ref:`causally consistent sessions
+<causal-consistency>`.
 
 Examples
 --------
@@ -167,7 +168,7 @@ Examples
     db.runCommand( { validate: "myCollection", repair: true } )
 
 - To validate the metadata in the ``myCollection`` collection, 
-  specify :ref:`meta data: true <cmd-validate-metadata>`:
+  specify :ref:`metadata: true <cmd-validate-metadata>`:
 
   .. code-block:: javascript