chore(deps): update grafana/helm-charts digest to 237c298

Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

.github/workflows/release-alloy-crd.yaml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   release:
-    uses: grafana/helm-charts/.github/workflows/update-helm-repo.yaml@e5ee6963cce3ab19519dc6dbd5f250aa14dc6f12
+    uses: grafana/helm-charts/.github/workflows/update-helm-repo.yaml@237c29851b4fad8ce0102b5a9e11e1e1b6a4fed0
     permissions:
       contents: write
       id-token: write

.github/workflows/release-alloy-operator.yaml

@@ -13,7 +13,7 @@ permissions: {}
 
 jobs:
   release-chart:
-    uses: grafana/helm-charts/.github/workflows/update-helm-repo.yaml@e5ee6963cce3ab19519dc6dbd5f250aa14dc6f12
+    uses: grafana/helm-charts/.github/workflows/update-helm-repo.yaml@237c29851b4fad8ce0102b5a9e11e1e1b6a4fed0
     permissions:
       contents: write
       id-token: write