Update action.yml to use 0.8.0

Author: goergisn

action.yml

@@ -16,7 +16,7 @@ runs:
     steps:
     - name: 🍱 Compute prerequisites
       run: |
-        echo "VERSION_NUMBER=0.7.0" >> $GITHUB_ENV
+        echo "VERSION_NUMBER=0.8.0" >> $GITHUB_ENV
         echo "BINARY_PATH=$(swift build --configuration release --show-bin-path)/public-api-diff" >> $GITHUB_ENV
         echo "HEAD_GITHUB_REPO=${{github.server_url}}/${{ github.event.pull_request.head.repo.full_name || github.repository}}.git" >> $GITHUB_ENV
         echo "BASE_GITHUB_REPO=${{github.server_url}}/${{github.repository}}.git" >> $GITHUB_ENV
@@ -25,7 +25,7 @@ runs:
     - uses: actions/checkout@v4
       with:
         repository: "Adyen/adyen-swift-public-api-diff"
-        # ref: ${{ env.VERSION_NUMBER }}
+        ref: ${{ env.VERSION_NUMBER }}
 
     - name: 🛻 Restore Binary
       id: cache-restore