CI: install xcode 16.3 on  macos-15 runner

closes: #17111

Signed-off-by: Philip H. <47042125+pheiduck@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3c323a8..b35c3b6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -355,7 +355,7 @@
         if: matrix.runner == 'macos-15'
         run: |
           # Xcode 16 has compiler bugs which are fixed in 16.2+
-          sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
+          sudo xcode-select -s /Applications/Xcode_16.3.app/Contents/Developer
 
       - name: Set up environment
         run: |