fix: add check-labels workflow to CI jobs (#1025)

* Add check-labels workflow to CI jobs

To easy the generation of changelogs we're enforcing labels on PRs. In
eclipse-zenoh/ci#128 a new re-usable workflow
was added to check and this PR enables the check.

* fix: add check-labels job to ci status check

.github/workflows/ci.yml

@@ -27,6 +27,11 @@ env:
   RUSTUP_WINDOWS_PATH_ADD_BIN: 1
 
 jobs:
+  check-labels:
+    name: Check PR labels
+    uses: eclipse-zenoh/ci/.github/workflows/check-labels.yml@main
+    secrets: inherit
+
   check:
     name: Lints and doc tests on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
@@ -151,7 +156,7 @@ jobs:
   ci:
     name: CI status checks
     runs-on: ubuntu-latest
-    needs: [check, test, valgrind, typos]
+    needs: [check-labels, check, test, valgrind, typos]
     if: always()
     steps:
       - name: Check whether all jobs pass