Change the CI execution environment to macos

Based on the results from the verification job set up in #111, changing the machine type successfully generated the iOS target artifacts.
Therefore, we will apply this change to the job that uploads the library to Maven Central.

.github/workflows/publish.yml

@@ -10,7 +10,7 @@ on:
 
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
 
     permissions:
       contents: write