fix: rename section from 'Using tools' to 'tools' in mkdocs.yml

mkdocs.yml

@@ -57,7 +57,7 @@ nav:
       - Pyright: guides/pyright.md
       - pre-commit: guides/pre-commit.md
       - Test: guides/test.md
-      - Using tools:
+      - tools:
           - guides/tools/index.md
           - config: guides/tools/config.md
           - logger: guides/tools/logger.md