[clang-tidy] Update release notes

Author: ostorc

clang-tools-extra/docs/ReleaseNotes.rst

@@ -328,6 +328,11 @@ New check aliases
   <clang-tidy/checks/bugprone/copy-constructor-mutates-argument>`
   keeping initial check as an alias to the new one.
 
+- Renamed :doc:`google-build-namespaces` to
+  :doc:`misc-anonymous-namespace-in-header
+  <clang-tidy/checks/misc/anonymous-namespace-in-header>`
+  keeping initial check as an alias to the new one.
+
 Changes in existing checks
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
 

clang-tools-extra/test/clang-tidy/checkers/google/namespaces.cpp

@@ -1,3 +1,6 @@
+// RUN: clang-tidy %s -checks='-*,google-build-namespaces,google-build-using-namespace' -header-filter='.*' -- | FileCheck %s -implicit-check-not="{{warning|error}}:"
+#include "../misc/Inputs/anon-namespaces.h"
+// CHECK: warning: do not use unnamed namespaces in header files [google-build-namespaces]
 using namespace spaaaace;
 // CHECK: :[[@LINE-1]]:1: warning: do not use namespace using-directives; use using-declarations instead [google-build-using-namespace]