Merge pull request #23471 from storybookjs/update-pr-template

Documentation: Add "build" tag to PULL_REQUEST_TEMPLATE.md

.github/PULL_REQUEST_TEMPLATE.md

@@ -30,7 +30,7 @@ Closes #
 - [ ] When this PR is ready for testing, make sure to add `ci:normal`, `ci:merged` or `ci:daily` GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in `code/lib/cli/src/sandbox-templates.ts`
 - [ ] Make sure this PR contains **one** of the labels below.
 
-`["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]`
+`["cleanup", "BREAKING CHANGE", "feature request", "bug", "build", "documentation", "maintenance", "dependencies", "other"]`
 
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