BUILD: Switch to ARM architecture for Mac tests.

Tests for the InterTypes Java integration are failing due to an architecture mismatch.

Author: epatters

.github/workflows/julia_ci.yml

@@ -49,7 +49,7 @@ jobs:
         include:
           # test macOS and Windows with latest Julia only
           - os: macOS-latest
-            arch: x64
+            arch: arm64
             version:  "1.10.0" 
           - os: windows-latest
             arch: x64