chore(helm): update image docker.io/grafana/grafana-image-renderer digest to 74911db (#31914)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/grafana/grafana-image-renderer | digest | `791977d` ->
`74911db` |

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charts/stable/grafana-image-renderer/Chart.yaml

@@ -33,4 +33,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/grafana-image-renderer
   - https://hub.docker.com/r/grafana/grafana-image-renderer
 type: application
-version: 7.5.1
+version: 7.5.2

charts/stable/grafana-image-renderer/values.yaml

@@ -1,7 +1,7 @@
 image:
   pullPolicy: IfNotPresent
   repository: docker.io/grafana/grafana-image-renderer
-  tag: latest@sha256:791977d55b7386437ba06082b1d934dbce421549f8dadd3a29849c502a5d36a9
+  tag: latest@sha256:74911db13290853ba47b6feb058d86e1a746e92e859c0e1bf73f3029750e8c43
 persistence: {}
 portal:
   open: