Xcode 16.4

Author: swhitty

.github/workflows/build.yml

@@ -6,10 +6,10 @@ on:
   workflow_dispatch:
 
 jobs:
-  xcode_16_3:
+  xcode_16_4:
     runs-on: macos-15
     env:
-      DEVELOPER_DIR: /Applications/Xcode_16.3.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_16.4.app/Contents/Developer
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -119,7 +119,7 @@ jobs:
 
   linux_swift_6_1:
     runs-on: ubuntu-latest
-    container: swift:6.1
+    container: swift:6.1.2
     steps:
       - name: Checkout
         uses: actions/checkout@v4