Use Xcode14 to generate documentation (#36)

Author: ra1028

.github/workflows/docs.yml

@@ -8,15 +8,11 @@ on:
   workflow_dispatch:
 
 jobs:
-  test:
-    name: Test
+  publish-docs:
+    name: Publish Documentation
     runs-on: macos-12
-    strategy:
-      matrix:
-        xcode_version:
-          - 13.3
     env:
-      DEVELOPER_DIR: /Applications/Xcode_${{ matrix.xcode_version }}.app
+      DEVELOPER_DIR: /Applications/Xcode_14.0.1.app
     steps:
       - uses: actions/checkout@v2
       - name: Build docs