Migrate from GitHub HashiBot pull_request_size_labeler behavior to GitHub Actions

Author: bflad

.github/workflows/pull-request.yml

@@ -10,3 +10,17 @@ jobs:
       with:
         configuration-path: .github/labeler-pull-request-triage.yml
         repo-token: "${{ secrets.GITHUB_TOKEN }}"
+    # See also: https://github.com/CodelyTV/pr-size-labeler/pull/26
+    - uses: bflad/pr-size-labeler@7df62b12a176513631973abfe151d2b6213c3f12
+      with:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        xs_label: 'size/XS'
+        xs_max_size: '30'
+        s_label: 'size/S'
+        s_max_size: '60'
+        m_label: 'size/M'
+        m_max_size: '150'
+        l_label: 'size/L'
+        l_max_size: '300'
+        xl_label: 'size/XL'
+        message_if_xl: ''