update github runner for macos from 11 to 12

Author: mbkumar

.github/workflows/conda.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        platform: [ubuntu-latest,  macos-11]
+        platform: [ubuntu-latest,  macos-12]
         python-version: ["3.9"]
 
     runs-on: ${{ matrix.platform }}

.github/workflows/wheel.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-11, ubuntu-20.04]
+        os: [macos-12, ubuntu-20.04]
 
     steps:
       - uses: actions/checkout@v4