chore: bump @grafana/create-plugin configuration to 5.26.4 (#2082)

Bumps
[`@grafana/create-plugin`](https://github.com/grafana/plugin-tools/tree/main/packages/create-plugin)
configuration from 4.2.1 to 5.26.4.

**Notes for reviewer:**
This is an auto-generated PR which ran `@grafana/create-plugin update`.
Please consult the create-plugin
[CHANGELOG.md](https://github.com/grafana/plugin-tools/blob/main/packages/create-plugin/CHANGELOG.md)
to understand what may have changed.
Please review the changes thoroughly before merging.

---------

Co-authored-by: grafana-plugins-platform-bot[bot] <144369747+grafana-plugins-platform-bot[bot]@users.noreply.github.com>
Co-authored-by: Zoltán Bedi <zoltan.bedi@gmail.com>

.github/workflows/push.yaml

@@ -14,7 +14,7 @@ jobs:
     name: CI
     uses: grafana/plugin-ci-workflows/.github/workflows/ci.yml@main
     with:
-      go-version: '1.24'
-      golangci-lint-version: '1.64.6'
+      go-version: '1.25'
+      golangci-lint-version: '2.4.0'
       plugin-version-suffix: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || '' }}
       run-playwright: true