[clang-tidy] Sort release notes entries alphabetically by check name

clang-tools-extra/docs/ReleaseNotes.rst

@@ -186,6 +186,10 @@ Changes in existing checks
 - Made :doc:`cert-oop57-cpp <clang-tidy/checks/cert/oop57-cpp>` more sensitive
   by checking for an arbitrary expression in the second argument of ``memset``.
 
+- Made the fix-it of :doc:`cppcoreguidelines-init-variables
+  <clang-tidy/checks/cppcoreguidelines/init-variables>` use ``false`` to initialize
+  boolean variables.
+
 - Improved :doc:`cppcoreguidelines-prefer-member-initializer
   <clang-tidy/checks/cppcoreguidelines/prefer-member-initializer>` check.
 
@@ -247,10 +251,6 @@ Changes in existing checks
   <clang-tidy/checks/readability/simplify-boolean-expr>` to simplify expressions
   using DeMorgan's Theorem.
 
-- Made the fix-it of :doc:`cppcoreguidelines-init-variables
-  <clang-tidy/checks/cppcoreguidelines/init-variables>` use ``false`` to initialize
-  boolean variables.
-
 Removed checks
 ^^^^^^^^^^^^^^