GitHub Actions: bump macos version to 15

Author: TheMostDiligent

.github/workflows/build-apple.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   precheks:
-    runs-on: macos-14
+    runs-on: macos-15
     name: MacOS -> Pre-Checks
 
     steps:
@@ -19,7 +19,7 @@ jobs:
 
   build:
     needs:   precheks
-    runs-on: macos-14
+    runs-on: macos-15
 
     strategy:
       matrix:

.github/workflows/build-emscripten.yml

@@ -6,7 +6,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os:         ["windows-latest", "ubuntu-24.04", "macos-14"]
+        os:         ["windows-latest", "ubuntu-24.04", "macos-15"]
         build_type: ["Debug", "Release"]
 
         exclude: