Fix Promises reference to react/whenever

Author: m-dango

doc/Type/Promise.pod6

@@ -90,8 +90,8 @@ Creates a new Promise that will be kept in C<$seconds> seconds, or later.
 C<$seconds> can be fractional or negative. Negative values are treated as
 C<0> (i.e. L<keeping|/routine/keep> the returned L<Promise> right away).
 
-Please note that situations like these are often more clearly handled wit
-a L<react and whenever block|language/concurrency#index-entry-react-react>.
+Please note that situations like these are often more clearly handled with
+a L<react and whenever block|/language/concurrency#index-entry-react-react>.
 
 =head2 method at
 
@@ -108,8 +108,8 @@ given as an L<Instant> or equivalent L<Numeric>—or as soon as possible after i
 If the given time is in the past, it will be treated as L<now> (i.e.
 L<keeping|/routine/keep> the returned L<Promise> right away).
 
-Please note that situations like these are often more clearly handled wit
-a L<react and whenever block|language/concurrency#index-entry-react-react>.
+Please note that situations like these are often more clearly handled with
+a L<react and whenever block|/language/concurrency#index-entry-react-react>.
 
 =head2 method kept