build(deps): bump extern/googletest from a1cc8c5 to 530d5c8

Bumps [extern/googletest](https://github.com/google/googletest) from `a1cc8c5` to `530d5c8`.
- [Release notes](https://github.com/google/googletest/releases)
- [Commits](google/googletest@a1cc8c5...530d5c8)

---
updated-dependencies:
- dependency-name: extern/googletest
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

cmake/FairMQDependencies.cmake

@@ -41,7 +41,7 @@ if(BUILD_TESTING)
   endif()
   find_package2(BUNDLED GTest REQUIRED)
   if(GTest_BUNDLED)
-    set(GTest_VERSION "Apr 8 2022 @a1cc8c55")
+    set(GTest_VERSION "Dec 14 2023 @530d5c8")
     set(GTest_PREFIX "<bundled>")
   endif()
 endif()