Remove the secrets from condition check (#18)

Author: cybcon

.github/workflows/container-vulnerability-scan.yaml

@@ -41,9 +41,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
       - name: Login to DockerHub container registry
-        if: ${{ inputs.login_dockerhub }} &&
-            ${{ secrets.DOCKERHUB_USERNAME }} != null &&
-            ${{ secrets.DOCKERHUB_PASSWORD }} != null
+        if: ${{ inputs.login_dockerhub }} == true
         uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}