Added a section on upgrading your project

Author: matt-aitken

docs/v3/upgrading-from-v2.mdx

@@ -16,7 +16,7 @@ The main difference is that things in v3 are far simpler. That's because in v3 y
 3. Just use official SDKs, not integrations.
 4. `task`s are the new primitive, not `job`s.
 
-## OpenAI example
+## OpenAI example comparison
 
 This is a (very contrived) example that does a long OpenAI API call (>10s), stores the result in a database, waits for 5 mins, and then returns the result.
 
@@ -135,7 +135,7 @@ export const openaiTask = task({
 });
 ```
 
-## Triggering tasks
+## Triggering tasks comparison
 
 ### v2
 
@@ -171,6 +171,28 @@ async function yourBackendFunction() {
 }
 ```
 
+## Upgrading your project
+
+<Steps>
+
+<Step title="Upgrade the v2 Trigger.dev packages">
+
+You can run this command to upgrade all the packages to the beta:
+
+```bash
+npx @trigger.dev/cli@beta update --to beta
+```
+
+</Step>
+
+<Step title="Follow the v3 quick start">
+
+Follow the [v3 quick start](/v3/quick-start) to get started with v3.
+
+</Step>
+
+</Steps>
+
 ## Using v2 together with v3
 
 You can use v2 and v3 in the same codebase. This can be useful where you already have v2 jobs or where we don't support features you need (yet).