spelling: declaring (#58596)

Author: jsoref

test/CrossImport/remark-option.swift

@@ -4,6 +4,6 @@
 // RUN: %target-typecheck-verify-swift -enable-cross-import-overlays -Rcross-import -I %t/include -I %t/lib/swift -F %t/Frameworks
 
 import DeclaringLibrary
-// FIXME: Similarly to horrible.swift, ideally we would emit this remark on DelcaringLibrary
+// FIXME: Similarly to horrible.swift, ideally we would emit this remark on DeclaringLibrary
 // decl, since the cross-import overlay actually belongs to the DeclaringLibrary. (SR-12223)
 import BystandingLibrary // expected-remark {{import of 'DeclaringLibrary' and 'BystandingLibrary' triggered a cross-import of '_OverlayLibrary'}}