Upgraded builds to macos-13

Author: digimezzo

.github/workflows/merge.yml

@@ -57,7 +57,7 @@ jobs:
                   path: release/Dopamine-*.pacman
 
     merge_build_on_mac:
-        runs-on: macos-12
+        runs-on: macos-13
         if: github.event.pull_request.merged == true
         steps:
             - uses: actions/checkout@v2

.github/workflows/nightly.yml

@@ -57,7 +57,7 @@ jobs:
                   path: release/Dopamine-*.pacman
 
     nightly_build_on_mac:
-        runs-on: macos-12
+        runs-on: macos-13
         steps:
             - uses: actions/checkout@v2
             - uses: actions/setup-node@master