Apply suggestions from code review

Co-authored-by: Colin Loretz <[email protected]>

Author: afgiel

docs/activities/Development_Guides.mdx

@@ -898,7 +898,7 @@ Incentivized sharing can help grow your Activity through network effects. This g
 
 When implementing sharing, you'll need to:
 1. Generate a unique ID for tracking the promotion
-2. Call the `shareLink` command
+2. Call the [`shareLink`](#DOCS_DEVELOPER_TOOLS_EMBEDDED_APP_SDK/sharelink) command
 3. Track the share attempt
 
 ```javascript
@@ -966,6 +966,8 @@ async function handleReferral() {
 - Handle edge cases like expired promotions gracefully
 - Consider implementing cool-down periods between shares
 
+---
+
 ### Preventing unwanted activity sessions
 
 Activities are surfaced through iframes in the Discord app. The activity website itself is publicly reachable at `<application_id>.discordsays.com`. Activities will expect to be able to communicate with Discord's web or mobile client via the Discord SDK's RPC protocol. If a user loads the activity's website in a normal browser, the Discord RPC server will not be present, and the activity will likely fail in some way.