CI : Reinstate macos-arm64 job

Author: murraystevenson

.github/workflows/main.yml

@@ -33,7 +33,8 @@ jobs:
           linux-gcc11,
           linux-debug-gcc11,
           windows,
-          windows-debug
+          windows-debug,
+          macos-arm64
         ]
 
         include:
@@ -76,6 +77,15 @@ jobs:
             publish: false
             jobs: 4
 
+          - name: macos-arm64
+            os: macos-14
+            buildType: RELEASE
+            options: .github/workflows/main/options.posix
+            dependenciesURL: https://github.com/GafferHQ/dependencies/releases/download/10.0.0/gafferDependencies-10.0.0-macos-arm64.tar.gz
+            tests: testCore testCorePython testScene testImage testAlembic testUSD testVDB
+            publish: true
+            jobs: 3
+
     runs-on: ${{ matrix.os }}
 
     container: ${{ matrix.containerImage }}