chore(tests.yml): update deprecated macos-13 runner

Signed-off-by: Vaughn Dice <[email protected]>

Author: vdice

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
   test-bot:
     strategy:
       matrix:
-        os: [ubuntu-22.04, macos-13]
+        os: [ubuntu-22.04, macos-15-intel]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Set up Homebrew