ci: explicitly specify macos runner version

The castxml binary is for Intel macOS -> point to macos-12.

Author: thewtex

.github/workflows/tests.yml

@@ -64,7 +64,7 @@ jobs:
             castxml-epic: 1
             cppstd: "-std=c++11"
 
-          - os: macos-latest
+          - os: macos-12
             compiler: xcode
             version: "default"
             python-version: "3.8"
@@ -90,7 +90,7 @@ jobs:
         run: |
           wget -q -O - https://data.kitware.com/api/v1/file/hashsum/sha512/bdbb67a10c5f8d1b738cd19cb074f409d4803e8077cb8c1072ef4eaf738fa871a73643f9c8282d58cae28d188df842c82ad6620b6d590b0396a0172a27438dce/download | tar zxf - -C ~/
       - name: Setup castxml for Mac
-        if: matrix.os == 'macos-latest'
+        if: matrix.os == 'macos-12'
         run: |
           wget -q -O - https://data.kitware.com/api/v1/file/hashsum/sha512/5d937e938f7b882a3a3e7941e68f8312d0898aaf2082e00003dd362b1ba70b98b0a08706a1be28e71652a6a0f1e66f89768b5eaa20e5a100592d5b3deefec3f0/download | tar zxf - -C ~/
       - name: Setup castxml config