Adjust GitHub Actions workflow to support macos-14 (Arm64) runners

Author: minoki

.github/workflows/build.yaml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         ghc: ['8.6.5', '8.8.4', '8.10.7', '9.0.2', '9.2.8', '9.4', '9.6', '9.8', '9.10']
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-13, macos-14, windows-latest]
         flags: ['', '--flags "fma3 f16c"', '--flags float128']
         exclude:
           # float128-0.1 doesn't support recent GHC (should we try --allow-newer?)
@@ -22,8 +22,13 @@ jobs:
           - os: windows-latest
             flags: '--flags float128'
           # Fragile
-          - os: macos-latest
+          - os: macos-13
             flags: '--flags "fma3 f16c"'
+          # macos-14 (Arm64) doesn't support older GHC
+          - os: macos-14
+            ghc: '8.6.5'
+          - os: macos-14
+            ghc: '8.8.4'
     steps:
       - uses: actions/checkout@v4
 
@@ -57,7 +62,7 @@ jobs:
     strategy:
       matrix:
         ghc: ['8.6.5', '8.8.4', '8.10.7', '9.0.2', '9.2.8', '9.4', '9.6', '9.8', '9.10']
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-13, macos-14, windows-latest]
         flags: ['', '--flags x87-long-double']
         exclude:
           - ghc: '9.4'
@@ -68,6 +73,14 @@ jobs:
             flags: '--flags x87-long-double'
           - ghc: '9.10'
             flags: '--flags x87-long-double'
+          # macos-14 (Arm64) doesn't support older GHC
+          - os: macos-14
+            ghc: '8.6.5'
+          - os: macos-14
+            ghc: '8.8.4'
+          # macos-14 (Arm64) doesn't support x87-long-double
+          - os: macos-14
+            flags: '--flags x87-long-double'
     steps:
       - uses: actions/checkout@v4