Update docker.yml

Author: preetkaran20

.github/workflows/docker.yml

@@ -44,4 +44,4 @@ jobs:
         run: |
           ./gradlew jib \
           -Djib.to.image=sasanlabs/owasp-vulnerableapp:unreleased \
-          -Djib.to.tags=$GITVERSION_SEMVER
+          -Djib.to.tags=$GITVERSION_SEMVER,latest