Revert "workflows: analysis: default checkout"

This reverts commit 55f02b550bd248e8e5254dd2bdf48130f1d1eee2.

Signed-off-by: Álvaro Brey <alvaro.brey@nextcloud.com>

.github/workflows/analysis.yml

@@ -28,6 +28,8 @@ jobs:
                     echo "PR: ${{ steps.get-vars.outputs.pr }}"
                     echo "RUN NUMBER: $GITHUB_RUN_NUMBER"
             -   uses: actions/checkout@v3
+                with:
+                    ref: ${{ steps.get-vars.outputs.branch }}
             -   name: Set up JDK 11
                 uses: actions/setup-java@v2
                 with: