Bump cppcheck from 1.5.1 to 1.5.2 in /cmake/requirements

Bumps [cppcheck](https://github.com/msclock/cppcheck-wheel) from 1.5.1 to 1.5.2.
- [Release notes](https://github.com/msclock/cppcheck-wheel/releases)
- [Commits](https://github.com/msclock/cppcheck-wheel/compare/v1.5.1...v1.5.2)

---
updated-dependencies:
- dependency-name: cppcheck
  dependency-version: 1.5.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

cmake/requirements/requirements-cppcheck.txt

@@ -1 +1 @@
-cppcheck==1.5.1
+cppcheck==1.5.2

docs/mkdocs/mkdocs.yml

@@ -453,12 +453,8 @@ plugins:
       # package badges (the fetch fails, then reading the missing cache entry
       # raises FileNotFoundError). Readers' browsers are served normally, so
       # leave these badges as external references instead of self-hosting them.
-      # The same goes for img.shields.io, whose version badges time out from
-      # time to time (strict mode turns the failed download into an error) and
-      # would go stale between builds if they were self-hosted anyway.
       assets_exclude:
         - repology.org/*
-        - img.shields.io/*
   - llmstxt:
       markdown_description: >
         JSON for Modern C++ is a C++11 header-only library implementing a JSON