Switch runner to MacOS 15

The macos 13 runner is deprecated and may fail sometimes, see actions/runner-images#13046

Author: travkin79

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
   build:
 
     #runs-on: ubuntu-latest
-    runs-on: macos-13
+    runs-on: macos-15
 
     steps:
     - name: Install Graphviz (needed for PlantUML)
@@ -43,7 +43,7 @@ jobs:
     #  uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
 
   deploy:
-    runs-on: macos-13
+    runs-on: macos-15
     needs: build
     if: github.ref_name == 'develop'
     permissions: