Repo File Sync: Refactor regex-pull-requests.yml (#1060)

synced local file(s) with
[microsoft/mu_devops](https://github.com/microsoft/mu_devops).

🤖: View the [Repo File Sync Configuration
File](https://github.com/microsoft/mu_devops/blob/main/.sync/Files.yml)
to see how files are synced.

---

This PR was created automatically by the
[repo-file-sync-action](https://github.com/BetaHuhn/repo-file-sync-action)
workflow run
[#11631955745](https://github.com/microsoft/mu_devops/actions/runs/11631955745)

Signed-off-by: Project Mu UEFI Bot <uefibot@microsoft.com>

.github/workflows/label-issues/regex-pull-requests.yml

@@ -14,9 +14,15 @@
 
 # Maintenance: Keep labels organized in ascending alphabetical order - easier to scan, identify duplicates, etc.
 
+type:backport:
+  - '\s*-\s*\[\s*[x|X]\s*\] Backport to release branch\?'
+
 impact:breaking-change:
   - '\s*-\s*\[\s*[x|X]\s*\] Breaking change\?'
 
+type:documentation:
+  - '\s*-\s*\[\s*[x|X]\s*\] Includes documentation\?'
+
 impact:non-functional:
   - '\s*-\s*\[\s*(?![x|X])\s*\] Impacts functionality\?'
 
@@ -25,6 +31,3 @@ impact:security:
 
 impact:testing:
   - '\s*-\s*\[\s*[x|X]\s*\] Includes tests\?'
-
-type:documentation:
-  - '\s*-\s*\[\s*[x|X]\s*\] Includes documentation\?'