Update build.yml to rename macOS CI build to arm64

Author: mcuee

.github/workflows/build.yml

@@ -218,7 +218,7 @@ jobs:
             build/src/avrdude
             build/src/avrdude.conf
 
-  macos-x86_64:
+  macos-arm64:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v3
@@ -265,20 +265,20 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: build-macos-x86_64
+          name: build-macos-arm64
           path: |
             build/
             !**/*.d
             !**/*.o
       - name: Archive executables
         uses: actions/upload-artifact@v4
         with:
-          name: avrdude-macos-x86_64
+          name: avrdude-macos-arm64
           path: |
             build/src/avrdude
             build/src/avrdude.conf
 
-  macos-x86_64-autotools:
+  macos-arm64-autotools:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v3