Fix typos of "outputs" in comments.

This also fixes a similar typo in the ordinary coin selection algorithm.

In response to review feedback:

#2618 (comment)

lib/core/src/Cardano/Wallet/Primitive/CoinSelection/MA/RoundRobin.hs

@@ -223,7 +223,7 @@ data SelectionResult change = SelectionResult
         -- ^ An optional extra source of ada.
     , outputsCovered
         :: ![TxOut]
-        -- ^ A list of ouputs covered.
+        -- ^ A list of outputs covered.
         -- FIXME: Left as a list to allow to work-around the limitation of
         -- 'performSelection' which cannot run for no output targets (e.g. in
         -- the context of a delegation transaction). This allows callers to

lib/core/src/Cardano/Wallet/Primitive/Migration/Selection.hs

@@ -630,7 +630,7 @@ addValueToOutputs constraints outputsOriginal outputUnchecked =
         --
         -- As a tie-breaker, we give priority to outputs with smaller numbers
         -- of assets. Merging with a smaller output is more likely to succeed,
-        -- because merging with a larger ouput is more likely to fall foul of
+        -- because merging with a larger output is more likely to fall foul of
         -- the output size limit.
         outputsSorted :: [TokenMap]
         outputsSorted = L.sortOn sortOrder outputs