chore(deps): update grafana/shared-workflows/get-vault-secrets action to v1.3.0 (#366)

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

Author: renovate-sh-app[bot]

.github/workflows/e2e.yml

@@ -44,7 +44,7 @@ jobs:
           uv sync --all-groups
 
       - id: get-secrets
-        uses: grafana/shared-workflows/actions/get-vault-secrets@2dd0b0349e130ca5ccf86b3a61250589a840bdb2 # get-vault-secrets-v1.2.0
+        uses: grafana/shared-workflows/actions/get-vault-secrets@a37de51f3d713a30a9e4b21bcdfbd38170020593 # get-vault-secrets/v1.3.0
         with:
           # Secrets placed in the ci/repo/grafana/mcp-grafana/<path> path in Vault
           repo_secrets: |

.github/workflows/integration.yml

@@ -60,7 +60,7 @@ jobs:
           cache: true
 
       - id: get-secrets
-        uses: grafana/shared-workflows/actions/get-vault-secrets@2dd0b0349e130ca5ccf86b3a61250589a840bdb2 # get-vault-secrets-v1.2.0
+        uses: grafana/shared-workflows/actions/get-vault-secrets@a37de51f3d713a30a9e4b21bcdfbd38170020593 # get-vault-secrets/v1.3.0
         with:
           # Secrets placed in the ci/repo/grafana/mcp-grafana/<path> path in Vault
           repo_secrets: |