fix changelog entry formatting to match renovate process

CHANGELOG.md

@@ -3,47 +3,40 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ---
-## [ 5.5.0-bb.8] 2024-12-11
-
+## [5.5.0-bb.8] - 2024-12-11
 ### Added
 
 - Added Istio monitoring auth policy, auth policy template, sidecar, and service entry
 
-## [ 5.5.0-bb.7] 2024-12-11
-
+## [5.5.0-bb.7] - 2024-12-11
 ### Added 
 
 - Network Policy for Grafana ingress
 - Changed the index pattern for network policies
 
-## [ 5.5.0-bb.6] 2024-12-11
-
+## [5.5.0-bb.6] - 2024-12-11
 ### Added 
 
 - Added higher Mimir ingester limits to values.yaml
 - Added grpc and http ports to values.yaml instead of importing from upstream
 
-## [ 5.5.0-bb.5] 2024-12-04
-
+## [5.5.0-bb.5] - 2024-12-04
 ### Changed
 
 - Appended release name to Default-deny-all network policies
 
-## [ 5.5.0-bb.4] 2024-11-13
-
+## [5.5.0-bb.4] - 2024-11-13
 ### Added
 
 - Added more robust netpols
 
-## [ 5.5.0-bb.3] 2024-11-13
-
+## [5.5.0-bb.3] - 2024-11-13
 ### Added
 
 - Added istio peerauthentication policy
 - Added minimum required netpols to deploy Mimir with istio
 
-## [ 5.5.0-bb.2] 2024-11-05
-
+## [5.5.0-bb.2] - 2024-11-05
 ### Changed
 
 - Modified chart.yaml details to accurately match upstream 5.5.0 tag
@@ -55,16 +48,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 - Removed additional unused values from values.yaml
 
-## [ 5.5.0-bb.1] 2024-10-31
-
+## [5.5.0-bb.1] - 2024-10-31
 ### Changed
 
 - Disabled MinIO and Grafana-Agent Operator
 - Cleaned up values.yaml
 - Add in default filesystem config
 
-## [ 5.5.0-bb.0]
-
+## [5.5.0-bb.0]
 ### Changetype (<https://keepachangelog.com/en/1.0.0/#how>)
 
 - Initialized repo