chore: Update verified-commits.mdx

cloud/features/verified-commits.mdx

@@ -29,12 +29,12 @@ To do this, head to your user settings in Flipt Cloud, and click 'Generate Key'.
 
 Copy the key as you'll need to add it to GitHub in the next step.
 
-## Adding Your Key to GitHub
+## Add Your Key to GitHub
 
 Head to your [key settings](https://github.com/settings/keys) in GitHub, and add it
 as an **SSH Signing Key**.
 
-It's important that it should be a signing key, rather than an authentication
+It must be a signing key, rather than an authentication
 key, as we don't want this key to be able to push to your repositories, just to
 verify commits.
 
@@ -43,4 +43,4 @@ verify commits.
 ## How We Store Your Key
 
 Flipt uses [AWS Key Management Service (KMS)](https://aws.amazon.com/kms/) to generate and store your signing key. This means we don't
-ever have access to the private key, and instead ask the KMS API to sign commits using your key.
+ever have access to the private key, and instead, ask the KMS API to sign commits using your key.