Update docs/modules/ROOT/pages/build-blockchain/register-sidechain.adoc

Co-authored-by: Muhammad Talha <13951043+TalhaMaliktz@users.noreply.github.com>

docs/modules/ROOT/pages/build-blockchain/register-sidechain.adoc

@@ -700,7 +700,7 @@ Once the aggregated BFT weight of the validators who signed is equal to or above
 
 ==== Aggregating the validator signatures
 
-Once enough validators added their signatures, the list of signatures is aggregated into one single signature, which is then appended to the registration params that we created in step <<preparing-the-register-mainchain-parameters>>.
+Once enough validators add their signatures, the list of signatures is aggregated into one single signature, which is then appended to the registration params that we created in step <<preparing-the-register-mainchain-parameters>>.
 
 signature::
 The `signature` property is an aggregate signature of the sidechain validators.