spelling: cannot

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

Author: jsoref

Sources/GRPCCore/RPCError.swift

@@ -210,7 +210,7 @@ extension RPCError.Code {
   /// The caller does not have permission to execute the specified operation.
   /// ``permissionDenied`` must not be used for rejections caused by exhausting
   /// some resource (use ``resourceExhausted`` instead for those errors).
-  /// ``permissionDenied`` must not be used if the caller can not be identified
+  /// ``permissionDenied`` must not be used if the caller cannot be identified
   /// (use ``unauthenticated`` instead for those errors).
   public static let permissionDenied = Self(code: .permissionDenied)
 

Sources/GRPCCore/Status.swift

@@ -230,7 +230,7 @@ extension Status.Code {
   /// The caller does not have permission to execute the specified operation.
   /// ``permissionDenied`` must not be used for rejections caused by exhausting
   /// some resource (use ``resourceExhausted`` instead for those errors).
-  /// ``permissionDenied`` must not be used if the caller can not be identified
+  /// ``permissionDenied`` must not be used if the caller cannot be identified
   /// (use ``unauthenticated`` instead for those errors).
   public static let permissionDenied = Self(code: .permissionDenied)