l10n: bump Actions versions in l10n.yml

This avoids the "Node.js 16 Actions are deprecated" warnings.

Original-commits-by: dependabot[bot] <[email protected]>
Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/l10n.yml

@@ -63,7 +63,7 @@ jobs:
             origin \
             ${{ github.ref }} \
             $args
-      - uses: actions/setup-go@v2
+      - uses: actions/setup-go@v5
         with:
           go-version: '>=1.16'
       - name: Install git-po-helper
@@ -91,7 +91,7 @@ jobs:
           cat git-po-helper.out
           exit $exit_code
       - name: Create comment in pull request for report
-        uses: mshick/add-pr-comment@v1
+        uses: mshick/add-pr-comment@v2
         if: >-
           always() &&
           github.event_name == 'pull_request_target' &&