chore(deps): bump https://github.com/grafana/grafana from 5.5.6 to 5.5.7

Command run was `jx step create pr versions --filter=* --images --excludes=jetstack/cert-manager --excludes=jx-labs/jxl-boot --excludes=stable/nginx-ingress --batch-mode`

charts/stable/grafana.yml

@@ -1 +1 @@
-version: 5.5.6
+version: 5.5.7

dependency-matrix/matrix.md

@@ -21,7 +21,7 @@ Dependency | Sources | Version | Mismatched versions
 [jetstack/cert-manager](https://github.com/jetstack/cert-manager) |  | [v0.9.1](https://github.com/jetstack/cert-manager/releases/tag/v0.9.1) | 
 [helm/charts](https://github.com/helm/charts/tree/master/stable/nginx-ingress) |  | [1.17.1]() | 
 [bitnami/charts](https://github.com/bitnami/charts/tree/master/bitnami/external-dns) |  | [2.10.2]() | 
-[grafana/grafana](https://github.com/grafana/grafana) |  | [5.5.6]() | 
+[grafana/grafana](https://github.com/grafana/grafana) |  | [5.5.7]() | 
 [prometheus/alertmanager](https://github.com/prometheus/alertmanager) |  | [11.12.0]() | 
 [weaveworks/flagger](https://github.com/weaveworks/flagger):flagger |  | [1.1.0](https://github.com/weaveworks/flagger/releases/tag/v1.1.0) | 
 [weaveworks/flagger](https://github.com/weaveworks/flagger):grafana |  | [1.4.0]() | 

dependency-matrix/matrix.yaml

@@ -164,7 +164,7 @@ dependencies:
   owner: grafana
   repo: grafana
   url: https://github.com/grafana/grafana
-  version: 5.5.6
+  version: 5.5.7
   versionURL: ""
 - host: github.com
   owner: prometheus