CI: use macos-13

Signed-off-by: falkTX <falktx@falktx.com>

Author: falkTX

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         target: [intel, universal]
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
     - uses: actions/checkout@v4
       with: