Update product_docs/docs/pgd/5/terminology.mdx

Co-authored-by: Lenz Grimmer <[email protected]>

product_docs/docs/pgd/5/terminology.mdx

@@ -115,7 +115,7 @@ A PGD cluster is based around bidirectional replication, but in some use cases s
 
 #### Two-phase commit (2PC)
 
-A multi-step process for achieving consistency across multiple database nodes. A first phase sees a transaction prepared on an originating node and sent to all participating nodes. Each participating node validates that it can apply the transaction and 
+A multi-step process for achieving consistency across multiple database nodes. The first phase sees a transaction prepared on an originating node and sent to all participating nodes. Each participating node validates that it can apply the transaction and 
 signals its readiness to the originating node. This is the pre-commit or prepare phase. In the second phase, if all the participating nodes signal they are ready, the originating node proceeds to commit the transaction and signals the participating nodes to commit, too. This is the commit phase. If, in the pre-commit phase, any node signals it is not ready, the entire transaction is aborted. It's this process that ensures all nodes get the same changes.
 
 #### Vertical scaling or scale up