Update canonical/charming-actions action to v2.6.0 (#422)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -47,7 +47,7 @@ jobs:
           # Workaround for https://github.com/canonical/charmcraft/issues/1389#issuecomment-1880921728
           touch requirements.txt
       - name: Check libs
-        uses: canonical/charming-actions/check-libraries@2.4.0
+        uses: canonical/charming-actions/check-libraries@2.6.0
         with:
           credentials: ${{ secrets.CHARMHUB_TOKEN }}
           github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yaml

@@ -21,7 +21,7 @@ jobs:
           # Workaround for https://github.com/canonical/charmcraft/issues/1389#issuecomment-1880921728
           touch requirements.txt
       - name: Check libs
-        uses: canonical/charming-actions/check-libraries@2.4.0
+        uses: canonical/charming-actions/check-libraries@2.6.0
         with:
           credentials: ${{ secrets.CHARMHUB_TOKEN }} # FIXME: current token will expire in 2023-07-04
           github-token: ${{ secrets.GITHUB_TOKEN }}