spelling: overload (#58581)

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>

Author: jsoref

test/Compatibility/tuple_arguments_4.swift

@@ -2,7 +2,7 @@
 
 // https://bugs.swift.org/browse/SR-6837
 
-// FIXME: Can't overlaod local functions so these must be top-level
+// FIXME: Can't overload local functions so these must be top-level
 func takePairOverload(_ pair: (Int, Int?)) {}
 func takePairOverload(_: () -> ()) {}