Build the lsp and tools for macOS with Xcode 26

For corner radius with the live-preview window when running on 26

Author: tronical

.github/workflows/nightly_snapshot.yaml

@@ -120,7 +120,7 @@ jobs:
     build_vscode_lsp_macos_aarch64_bundle:
         env:
             SLINT_NO_QT: 1
-        runs-on: macos-14
+        runs-on: macos-26
         steps:
             - uses: actions/checkout@v5
             - uses: ./.github/actions/setup-rust

.github/workflows/slint_tool_binary.yaml

@@ -167,7 +167,7 @@ jobs:
                 path: slint-${{ github.event.inputs.program || inputs.program }}-${{ matrix.target }}.tar.gz
 
     build_macos:
-        runs-on: macos-14
+        runs-on: macos-26
         steps:
             - uses: actions/checkout@v5
             - uses: ./.github/actions/setup-rust