[release-v1.17][npm]: Bump @backstage/plugin-app-backend from 0.3.55 to 0.5.6 in /backstage#793

dependabot[bot] wants to merge 1 commit intorelease-v1.17openshift-knative/backstage-plugins:release-v1.17from

dependabot/npm_and_yarn/backstage/release-v1.17/backstage/plugin-app-backend-0.5.6openshift-knative/backstage-plugins:dependabot/npm_and_yarn/backstage/release-v1.17/backstage/plugin-app-backend-0.5.6Copy head branch name to clipboard