chore(changelog): use yml to stay consistent with the rest of this

repo's naming conventions

.github/workflows/changelog.yaml → .github/workflows/changelog.yml

@@ -18,11 +18,11 @@ jobs:
         with:
           fetch-depth: 2
 
-      - name: Retrives changed files in CHANGELOG/unreleased/**/*.yaml
+      - name: Retrives changed files in CHANGELOG/unreleased/**/*.yml
         id: changelog-check
         uses: tj-actions/changed-files@2f7246cb26e8bb6709b6cbfc1fec7febfe82e96a # v37
         with:
-          files: 'CHANGELOG/unreleased/**/*.yaml'
+          files: 'CHANGELOG/unreleased/**/*.yml'
 
       - name: Requires a changelog file if 'skip-changelog' label is not added
         if: ${{ !contains(github.event.*.labels.*.name, 'skip-changelog') }}
@@ -44,4 +44,4 @@ jobs:
         with:
           jsonSchemaFile: CHANGELOG/schema.json
           yamlFiles: |
-            CHANGELOG/unreleased/*/*.yaml
+            CHANGELOG/unreleased/*/*.yml

CHANGELOG/README.md

@@ -6,15 +6,15 @@ The `kong/CHANGELOG.md` now is deprecated.
 
 ## How to add a changelog file for your PR?
 
-1/ Copy the `changelog-template.yaml` file and rename with your PR number or a short message as the filename. For example, `11279.yaml`, `introduce-a-new-changelog-system.yaml`. (Prefer using PR number as it's already unique and wouldn't introduce conflict)
+1/ Copy the `changelog-template.yml` file and rename with your PR number or a short message as the filename. For example, `11279.yml`, `introduce-a-new-changelog-system.yml`. (Prefer using PR number as it's already unique and wouldn't introduce conflict)
 
 2/ Fill out the changelog template.
 
 
 The description of the changelog file field, please follow the `schema.json` for more details.
 
 - message: Message of the changelog
-- type: Changelog type. (`feature`, `bugfix`, `dependency`, `deprecation`, `breaking_change`)
+- type: Changelog type. (`feature`, `bugfix`, `dependency`, `deprecation`, `breaking_change`, `performance`)
 - scope: Changelog scope. (`Core`, `Plugin`, `PDK`, `Admin API`, `Performance`, `Configuration`, `Clustering`)
 - prs: List of associated GitHub PRs
 - issues: List of associated GitHub issues

CHANGELOG/changelog

@@ -94,8 +94,7 @@ end
 
 
 local function is_yaml(filename)
-  return pl_stringx.endswith(filename, ".yaml") or
-    pl_stringx.endswith(filename, ".yml")
+  return pl_stringx.endswith(filename, ".yml")
 end
 
 local function is_empty_table(t)