chore(deps): bump grafana/shared-workflows in the github-actions group

Bumps the github-actions group with 1 update: [grafana/shared-workflows](https://github.com/grafana/shared-workflows).


Updates `grafana/shared-workflows` from bc9486e0e7cbe24b54d0dcdf8be459eb777567b0 to b502a15952bab7f72daa1f8ce115491a6d97be59
- [Release notes](https://github.com/grafana/shared-workflows/releases)
- [Changelog](https://github.com/grafana/shared-workflows/blob/main/CHANGELOG.md)
- [Commits](grafana/shared-workflows@bc9486e...b502a15)

---
updated-dependencies:
- dependency-name: grafana/shared-workflows
  dependency-version: b502a15952bab7f72daa1f8ce115491a6d97be59
  dependency-type: direct:production
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -23,7 +23,7 @@ jobs:
           version: v0.20.0
 
       - name: setup jrsonnet
-        uses: grafana/shared-workflows/actions/setup-jrsonnet@bc9486e0e7cbe24b54d0dcdf8be459eb777567b0
+        uses: grafana/shared-workflows/actions/setup-jrsonnet@b502a15952bab7f72daa1f8ce115491a6d97be59
 
       - name: Build xpkg
         run: "make -B build"