Fix typo

Co-authored-by: Jamie <2119834+jamieQ@users.noreply.github.com>

Author: hamishknight

utils/swift-xcodegen/README.md

@@ -80,7 +80,7 @@ PROJECT CONFIGURATION:
                           disabled by default.
 
                           A development snapshot is necessary to avoid spurious build/live issues
-                          due to fact that the the stdlib is built using the just-built Swift
+                          due to the fact that the the stdlib is built using the just-built Swift
                           compiler, which may support features not yet supported by the Swift
                           compiler in Xcode's toolchain. (default: --no-stdlib-swift)
   --test-folders/--no-test-folders

utils/swift-xcodegen/Sources/swift-xcodegen/Options.swift

@@ -168,7 +168,7 @@ struct ProjectOptions: ParsableArguments {
       disabled by default. 
       
       A development snapshot is necessary to avoid spurious build/live issues
-      due to fact that the the stdlib is built using the just-built Swift
+      due to the fact that the the stdlib is built using the just-built Swift
       compiler, which may support features not yet supported by the Swift
       compiler in Xcode's toolchain.
       """