Apply @cdecker typo suggestions from code review

Co-authored-by: Christian Decker <decker.christian@gmail.com>

common/random_select.h

@@ -11,7 +11,7 @@
 /**
  * random_select: return true if we should select this one.
  * @weight: weight for this option (use 1.0 if all the same)
- * @tot_wieght: returns with sum of weights (must be initialized to zero)
+ * @tot_weight: returns with sum of weights (must be initialized to zero)
  *
  * This always returns true on the first non-zero weight, and weighted
  * randomly from then on.

common/route.h

@@ -12,7 +12,7 @@ struct route {
 	struct gossmap_chan *c;
 };
 
-/* Can c carrt amount in dir? */
+/* Can c carry amount in dir? */
 bool route_can_carry(const struct gossmap *map,
 		     const struct gossmap_chan *c,
 		     int dir,