chore(deps): pin ghcr.io/diamondlightsource/blueapi docker tag to 6aa195d

Author: renovate[bot]

helm/blueapi/values.yaml

@@ -9,7 +9,7 @@ image:
   # This sets the pull policy for images.
   pullPolicy: IfNotPresent
   # Overrides the image tag whose default is the chart appVersion.
-  tag: ""
+  tag: "@sha256:6aa195df57539a93d3910bf6b09ef574668372fbd2e32fd3120ed62a05d39baf"
 
 # This is for the secrets for pulling an image from a private repository more information can be found here: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
 imagePullSecrets: []