add rollup for linux-x64-musl

Author: jalafel

.licensed.yml

@@ -16,6 +16,7 @@ ignored:
   npm:
     # Used by Rollup.js when building in GitHub Actions
     - '@rollup/rollup-linux-x64-gnu'
+    - '@rollup/rollup-linux-x64-musl'
     - '@rollup/rollup-android-arm-eabi'
     - '@rollup/rollup-android-arm64'
     - '@rollup/rollup-darwin-arm64'