Kotlin MacOs switch to macos-13

Switch off of macos-latest which no longer has the 14.3 xcode installed. Version macos-13 does.

We should probably update our kotlin though.

.github/workflows/build.yml

@@ -382,13 +382,15 @@ jobs:
 
   build-kotlin-macos:
     name: Build Kotlin MacOS
-    runs-on: macos-latest
+    runs-on: macos-13
     steps:
     - name: Checkout
       uses: actions/checkout@v3
       # Force Xcode 14.3 since Xcode 15 doesnt support older versions of
       # kotlin. For Xcode 15, kotlin should be bumpped to 1.9.10
       # https://stackoverflow.com/a/77150623
+      # For now, run with macos-13 which has this 14.3 installed: 
+      # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md#xcode
     - name: Set up Xcode version
       run: sudo xcode-select -s /Applications/Xcode_14.3.app/Contents/Developer
     - uses: gradle/[email protected]