ci: automatically prettify CHANGELOG.md during release stage

.releaserc.json

@@ -11,7 +11,7 @@
     [
       "@semantic-release/exec",
       {
-        "prepareCmd": "./scripts/bundle.sh ${nextRelease.version} && ./scripts/package.sh"
+        "prepareCmd": "./scripts/bundle.sh ${nextRelease.version} && ./scripts/package.sh && npx prettier --write CHANGELOG.md"
       }
     ],
     "@semantic-release/npm",