Bump backstage version to 4.5.5

Signed-off-by: RHDH Bot <146280956+rhdh-bot@users.noreply.github.com>

Author: rhdh-bot

charts/backstage/Chart.yaml

@@ -47,4 +47,4 @@ sources: []
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
 # Note that when this chart is published to https://github.com/openshift-helm-charts/charts
 # it will follow the RHDH versioning 1.y.z
-version: 4.5.4
+version: 4.5.5

charts/backstage/README.md

@@ -1,7 +1,7 @@
 
 # RHDH Backstage Helm Chart for OpenShift
 
-![Version: 4.5.4](https://img.shields.io/badge/Version-4.5.4-informational?style=flat-square)
+![Version: 4.5.5](https://img.shields.io/badge/Version-4.5.5-informational?style=flat-square)
 ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
 
 A Helm chart for deploying Red Hat Developer Hub, which is a Red Hat supported version of Backstage.