Update macOS version in workflow configuration (flameshot-org#4456)

Author: borgmanJeremy

.github/workflows/MacOS-pack.yml

@@ -29,11 +29,11 @@ jobs:
       matrix:
         dist:
           - {
-              os: macos-14,
+              os: macos-15,
               arch: arm64
             }
           - {
-              os: macos-13,
+              os: macos-15,
               arch: intel
             }
     runs-on: ${{ matrix.dist.os }}
@@ -96,4 +96,4 @@ jobs:
         with:
           name: ${{ env.PRODUCT }}-${{ env.VER_INFO }}-artifact-macos-${{ matrix.dist.arch }}
           path: ${{ github.workspace }}/build/src/Flameshot-${{ env.VERSION }}.dmg
-          overwrite: true
+          overwrite: true