Merge pull request #1870 from riscv-software-src/ci-macos-13

Bump CI version to MacOS 13

Author: aswaterman

.github/workflows/continuous-integration.yml

@@ -38,7 +38,7 @@ jobs:
 
   test-macos:
     name: Test Spike build (MacOS)
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
       - uses: actions/checkout@v2
         with: