all: fix typos in comments (#21118)

internal/ethapi/api.go

@@ -287,7 +287,7 @@ func (s *PrivateAccountAPI) NewAccount(password string) (common.Address, error)
 	return common.Address{}, err
 }
 
-// fetchKeystore retrives the encrypted keystore from the account manager.
+// fetchKeystore retrieves the encrypted keystore from the account manager.
 func fetchKeystore(am *accounts.Manager) *keystore.KeyStore {
 	return am.Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)
 }