Merge pull request #577 from ocaml-multicore/update-macosx-intel

Switch macOS intel workflows from retired macos-13 to macos-15-intel

Author: jmid

.github/workflows/macosx-intel-530-trunk.yml

@@ -14,6 +14,6 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      runs_on: 'macos-13'
+      runs_on: 'macos-15-intel'
       platform: macos
       compiler_ref: refs/heads/5.3

.github/workflows/macosx-intel-540-trunk.yml

@@ -14,6 +14,6 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      runs_on: 'macos-13'
+      runs_on: 'macos-15-intel'
       platform: macos
       compiler_ref: refs/heads/5.4

.github/workflows/macosx-intel-550-trunk.yml

@@ -14,6 +14,6 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      runs_on: 'macos-13'
+      runs_on: 'macos-15-intel'
       platform: macos
       compiler_ref: refs/heads/trunk