Fix duplicate Swift version in workflow matrix

Removed duplicate Swift version entry from matrix.

Author: leogdion

.github/workflows/BushelCloud.yml

@@ -16,8 +16,6 @@ jobs:
         os: [noble, jammy]
         swift:
           - version: "6.2"
-          - version: "6.2"
-            nightly: true
           - version: "6.3"
             nightly: true