try to force m1 runner

Author: bksaiki

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ ubuntu-latest, windows-latest, macos-13, macos-14 ]
+        os: [ ubuntu-latest, windows-latest, macos-latest, macos-latest-arm ]
         racket: [ '8.0', 'current' ]
 
     runs-on: ${{ matrix.os }}