Bump Helm chart version to 0.5.5

Bump the operator Helm chart version to fix CI failure. The chart
was modified to add the vmcpImage value but the version wasn't bumped.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: jhrozek

deploy/charts/operator/Chart.yaml

@@ -2,5 +2,5 @@ apiVersion: v2
 name: toolhive-operator
 description: A Helm chart for deploying the ToolHive Operator into Kubernetes.
 type: application
-version: 0.5.4
+version: 0.5.5
 appVersion: "v0.6.9"

deploy/charts/operator/README.md

@@ -1,6 +1,6 @@
 # ToolHive Operator Helm Chart
 
-![Version: 0.5.4](https://img.shields.io/badge/Version-0.5.4-informational?style=flat-square)
+![Version: 0.5.5](https://img.shields.io/badge/Version-0.5.5-informational?style=flat-square)
 ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
 
 A Helm chart for deploying the ToolHive Operator into Kubernetes.