Fetch before running mullvad-version

Author: Serock3

.github/workflows/desktop-e2e.yml

@@ -177,6 +177,7 @@ jobs:
       - name: Build mullvad-version
         id: cargo-run
         run: |
+          git fetch --tags --prune-tags --force
           version=$(cargo run --package mullvad-version -q)
           echo "mullvad-version=$version"
           echo "mullvad-version=$version" >> "$GITHUB_OUTPUT"