Update swift_releases.yml

Author: shahmishal

_data/builds/swift_releases.yml

@@ -2121,9 +2121,9 @@
         - arm64
 - name: "6.1.2"
   tag: swift-6.1.2-RELEASE
-  xcode: Xcode 16.3
+  xcode: Xcode 16.4
   xcode_release: true
-  date: 2025-05-27
+  date: 2025-05-28
   platforms:
     - name: Ubuntu 20.04
       platform: Linux
@@ -2179,4 +2179,4 @@
       checksum: df0b40b9b582598e7e3d70c82ab503fd6fbfdff71fd17e7f1ab37115a0665b3b
       archs:
         - x86_64
-        - arm64
+        - arm64