fix(mosq): Check that API docs are actual in CI

.github/workflows/mosq__build.yml

@@ -73,3 +73,15 @@ jobs:
           mv $dir build
           python -m pytest --log-cli-level DEBUG --junit-xml=./results_esp32_${{ matrix.idf_ver }}_${dir#"ci/build_"}.xml --target=esp32
           done
+
+  check_api_docs:
+    name: Checks API Docs up-to-date
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Checks API Docs is actual
+        run: |
+          cp api.md api_orig.md
+          cd components/mosquitto
+          ./generate_api_docs.sh
+          diff -wB api.md api_orig.md