Fixed inputs reference.

.github/workflows/vulnerability-scan.yml

@@ -30,15 +30,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set summary
-        run: echo "${{ github.event.inputs.summary }}" >> $GITHUB_STEP_SUMMARY
-      - if: github.event.inputs.tag == '5.x'
+        run: echo "${{ inputs.summary }}" >> $GITHUB_STEP_SUMMARY
+      - if: inputs.tag == '5.x'
         uses: druzsan/setup-matrix@v2
         with:
           matrix: |
             images: ${{ vars.IMAGES }}
             exclude:
               - images: mailpit
-      - if: github.event.inputs.tag != '5.x'
+      - if: inputs.tag != '5.x'
         uses: druzsan/setup-matrix@v2
         with:
           matrix: |
@@ -54,7 +54,7 @@ jobs:
         id: checkout
         uses: actions/checkout@main
         with:
-          ref: ${{ github.event.inputs.tag }}
+          ref: ${{ inputs.tag }}
     outputs:
       ref: ${{ steps.checkout.outputs.ref }}
       commit: ${{ steps.checkout.outputs.commit }}
@@ -68,7 +68,7 @@ jobs:
         id: scan
         uses: crazy-max/ghaction-container-scan@v3
         with:
-          image: ${{ env.REGISTRY }}/${{ github.repository }}/${{ matrix.images }}:${{ github.event.inputs.tag }}
+          image: ${{ env.REGISTRY }}/${{ github.repository }}/${{ matrix.images }}:${{ inputs.tag }}
           dockerfile: ./images/${{ matrix.images }}
       - name: Upload SARIF file
         if: ${{ steps.scan.outputs.sarif != '' }}