ci: improve body of the automated PR

.github/workflows/autoupdate.yml

@@ -1,24 +1,25 @@
 # Creates a PR for updating RGBDS version automatcally
 # Trigger it and put the desired RGBDS version as the "version" 
 # parameter. Must match one of the available tags: https://github.com/gbdev/rgbds/tags
-name: Create PR for new RGBDS version
+name: Create PR to update RGBDS
 on:
   workflow_dispatch:
     inputs:
       version:
         required: true
 jobs:
   build:
-    name: Create PR for new RGBDS version
+    name: Create PR to update RGBDS
     runs-on: ubuntu-latest
     env:
         VERSION: ${{github.event.inputs.version}}
         BRANCH_NAME: autoupdate_rgbds_${{github.event.inputs.version}}
         COMMIT_MESSAGE: "dep: update RGBDS to ${{github.event.inputs.version}}"
         PR_TITLE: Update RGBDS to ${{github.event.inputs.version}}
-        PR_BODY: This is an automated PR to bump the RGBDS dependency to version ${{github.event.inputs.version}}. |
-         The patch was also tentatively updated and applied. Double check that this succeded. |
-         This Pull Request was created automatically by the 'autoupdate.yml' pipeline.
+        PR_BODY: |
+         This is an automated PR to bump the RGBDS dependency to version ${{github.event.inputs.version}}.
+         The patch was also tentatively updated and applied. Double check that this succeded.
+         This Pull Request was created by triggering the [autoupdate.yml](https://github.com/gbdev/rgbds-live/blob/master/.github/workflows/autoupdate.yml) pipeline.
     steps:
       - name: Checkout repository and submodules
         uses: actions/checkout@v2