ci: GitHub Actions: bump azure/setup-helm

Bumps [azure/setup-helm](https://github.com/azure/setup-helm) from 59b1c81c6280f5abebb1fb1bc585696daa7dfb42 to 9bc31f4ebc9c6b171d7bfbaa5d006ae7abdb4310.
- [Release notes](https://github.com/azure/setup-helm/releases)
- [Changelog](https://github.com/Azure/setup-helm/blob/main/CHANGELOG.md)
- [Commits](Azure/setup-helm@59b1c81...9bc31f4)

---
updated-dependencies:
- dependency-name: azure/setup-helm
  dependency-version: 9bc31f4ebc9c6b171d7bfbaa5d006ae7abdb4310
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/package-cosmotech-business-webapp-chart.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
-      - uses: azure/setup-helm@59b1c81c6280f5abebb1fb1bc585696daa7dfb42 # v5
+      - uses: azure/setup-helm@9bc31f4ebc9c6b171d7bfbaa5d006ae7abdb4310 # v5
 
       - name: Helm lint
         working-directory: webapp_server/charts/cosmotech-business-webapp