Use macOS-14 for Github Actions

- which is the latest stable version. They only support the last two stable versions, so we should be good for a while
- add step to install sbt since later version of the runner image don't include it

DAFFODIL-2952

.github/workflows/main.yml

@@ -41,14 +41,14 @@ jobs:
         java_distribution: [ temurin ]
         java_version: [ 8, 11, 17, 21 ]
         scala_version: [ 2.12.20 ]
-        os: [ ubuntu-22.04, windows-2022, macos-12 ]
+        os: [ ubuntu-22.04, windows-2022, macos-14-large ]
         exclude:
           # only run macos on java 17
-          - os: macos-12
+          - os: macos-14-large
             java_version: 8
-          - os: macos-12
+          - os: macos-14-large
             java_version: 11
-          - os: macos-12
+          - os: macos-14-large
             java_version: 21
         include:
           # configure shell/cc/ar for all OSes
@@ -60,7 +60,7 @@ jobs:
             shell: msys2 {0}
             env_cc: clang
             env_ar: llvm-ar
-          - os: macos-12
+          - os: macos-14-large
             shell: bash
             env_cc: cc
             env_ar: ar
@@ -108,6 +108,7 @@ jobs:
           brew tap-new local/libmxml
           brew extract --version 3.3.1 libmxml local/libmxml
           brew install [email protected]
+          brew install sbt
 
       - name: Install Dependencies (Linux)
         if: runner.os == 'Linux'