starters: upgrade GitHub actions

.github/workflows/import-publications.yml

@@ -21,9 +21,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python 3.12
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.12"
       - name: Install dependencies
@@ -38,7 +38,7 @@ jobs:
       - name: Create Pull Request
         # Set ID for `Check outputs` stage
         id: cpr
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           commit-message: 'content: import publications from Bibtex'
           title: Hugo Blox Builder - Import latest publications