CI: Fetch all tags

.github/workflows/main.yml

@@ -27,9 +27,17 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v3.3.0
+      - uses: actions/checkout@v4
         with:
           submodules: recursive
+          fetch-depth: 0
+
+      # Required for automatic versioning
+      # See https://github.com/actions/checkout/issues/1781
+      - name: Fetch all tags
+        run: |
+          git fetch --tags --force
+          git describe --always ${{ github.ref }}
       
       - name: Set up Python 3.8
         uses: actions/setup-python@v4.5.0