docs(skills): finish the trigger- rename on the lightweight-skills line

The getting-started reference in the skills.mdx lightweight-skills paragraph
(merged separately) was the last bare skill name; prefix it to trigger-getting-started.

Author: ericallam

docs/skills.mdx

@@ -28,7 +28,7 @@ The CLI detects your installed AI tools, lets you pick which skills to install,
 
 When you run `trigger dev` for the first time, the CLI offers to install the skills for you.
 
-The installed skills are lightweight. Most point to the full, version-pinned reference that ships inside `@trigger.dev/sdk`, which your assistant reads straight from `node_modules`. The API guidance it follows always matches the `@trigger.dev/sdk` version installed in your project, with no extra step on your part. The `getting-started` skill is self-contained, since it runs before the SDK is installed.
+The installed skills are lightweight. Most point to the full, version-pinned reference that ships inside `@trigger.dev/sdk`, which your assistant reads straight from `node_modules`. The API guidance it follows always matches the `@trigger.dev/sdk` version installed in your project, with no extra step on your part. The `trigger-getting-started` skill is self-contained, since it runs before the SDK is installed.
 
 ### Non-interactive install