chore: Fix codespell config (#1869)

* Add optin and opt-in to codespell ignored words

* Fix typo on multiple

* Fix typo on assignment

.github/.codespellignore

@@ -1,3 +1,5 @@
 clienta
 connectiona
 sover
+optin
+opt-in

tests/e2e/steps_partial_set_security.go

@@ -55,7 +55,7 @@ func stepsOptInChain() []Step {
 		},
 		// Οpt in "alice" and "bob" so the chain is not empty when it is about to start. Note, that "alice" and "bob" use
 		// the provider's public key (see `UseConsumerKey` is set to `false` in `getDefaultValidators`) and hence do not
-		// need a consumer-key assigment.
+		// need a consumer-key assignment.
 		{
 			Action: OptInAction{
 				Chain:     ChainID("consu"),

tests/integration/distribution.go

@@ -1117,7 +1117,7 @@ func (s *CCVTestSuite) TestMultiConsumerRewardsDistribution() {
 				bundle.GetCtx(),
 				accountKeeper.GetModuleAccount(bundle.GetCtx(), consumertypes.ConsumerToSendToProviderName).GetAddress(),
 			)
-			s.Require().Len(pool, 1, "consumer reward pool cannot have mutiple token denoms")
+			s.Require().Len(pool, 1, "consumer reward pool cannot have multiple token denoms")
 			rewardsPerConsumer = pool[0]
 		}