xfail swift-distributed-actors for main

Author: kavon

projects.json

@@ -3467,6 +3467,13 @@
             "job": [
               "source-compat"
             ]
+          },
+          {
+            "issue": "rdar://163791748",
+            "platform": "Darwin",
+            "compatibility": "5.7",
+            "branch": ["main"],
+            "job": ["source-compat"]
           }
         ]
       }