fix release note error due to the letter after the inline markup

Author: yuhaouy

clang/docs/ReleaseNotes.rst

@@ -687,7 +687,7 @@ AST Matchers
 - Fixed detection of explicit parameter lists in ``LambdaExpr``. (#GH168452)
 - Added ``hasExplicitParameters`` for ``LambdaExpr`` as an output attribute to
   AST JSON dumps.
-- Add ``arrayTypeLoc`` matcher for matching ``ArrayTypeLoc``s.
+- Add ``arrayTypeLoc`` matcher for matching ``ArrayTypeLoc``.
 
 clang-format
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