Pin macOS version to last x64 version (14 is arm only)

Author: gdziadkiewicz

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macOS-13]
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -38,4 +38,4 @@ jobs:
         name: nuget-package
         path: |
           bin/*.nupkg
-          bin/*.snupkg
+          bin/*.snupkg