Fix documentation typo and update MiMaFilters

Author: noti0na1

library/src/scala/annotation/stableNull.scala

@@ -1,7 +1,7 @@
 package scala.annotation
 
 /** An annotation that can be used to mark a mutable field as trackable for nullability.
- *  With explicit nulls, a normal mutable field can be tracked for nullability by flow typing,
+ *  With explicit nulls, a normal mutable field cannot be tracked for nullability by flow typing,
  *  since it can be updated to a null value at the same time.
  *  This annotation will force the compiler to track the field for nullability, as long as the
  *  prefix is a stable path.

project/MiMaFilters.scala

@@ -45,6 +45,7 @@ object MiMaFilters {
         ProblemFilters.exclude[MissingClassProblem]("scala.annotation.internal.reachCapability"),
         ProblemFilters.exclude[MissingClassProblem]("scala.annotation.internal.preview"),
         ProblemFilters.exclude[MissingClassProblem]("scala.annotation.unchecked.uncheckedCaptures"),
+        ProblemFilters.exclude[MissingClassProblem]("scala.annotation.stableNull"),
         ProblemFilters.exclude[MissingClassProblem]("scala.quoted.Quotes$reflectModule$ValOrDefDefMethods"),
         ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$3$u002E4$"),
         ProblemFilters.exclude[MissingClassProblem]("scala.runtime.stdLibPatches.language$3$u002E4$minusmigration$"),