Updates for auto-labeler branch regex (#391)

* Fix branch regex for "enhancement" label

* Make autolabeler branch regex case-insensitive

* Match `features/` branches to "enhancement" label

.github/release-drafter.yml

@@ -47,26 +47,26 @@ autolabeler:
       - go.sum
       - '**/.terraform.lock.hcl'
     branch:
-      - '/dependabot\/.+/'
+      - '/^dependabot\/.+$/i'
   - label: documentation
     files:
       - README
       - '**/doc/**'
       - '**/docs/**'
       - '**/*.md'
     branch:
-      - '/docs?/'
+      - '/^docs?\/.+$/'
   - label: bug
     branch:
-      - '/fix\/.+/'
-      - '/bug\/.+/'
+      - '/^fix\/.+$/i'
+      - '/^bug\/.+$/i'
     title:
       - '/\bfix(es)?\b/i'
       - '/\bbug\b/i'
   - label: enhancement
     branch:
-      - 'feat(ure)?\/.+/'
-      - 'enhance(s|ment)?\/.+/'
+      - '/^feat(ures?)?\/.+$/i'
+      - '/^enhance(s|ments?)?\/.+$/i'
     title:
       - '/\bfeat(ure)?\b/i'
       - '/\benhance(s|ment)?\b/i'