Fix the link breakage, and match it to the playground proxy

.github/workflows/pr-build-live-branch.yml

@@ -69,17 +69,13 @@ jobs:
         with:
           name: remote-data-blocks-${{ github.event.pull_request.number }}
           path: unzips/remote-data-blocks
-          retention-days: 2
+          retention-days: 7
           if-no-files-found: 'error'
           overwrite: true
 
-      - name: Output artifact ID
-        run: echo 'Artifact ID is ${{ steps.create-playground-artifact-step.outputs.artifact-url }}'
-
       - name: Comment on PR with WordPress Playground details
         uses: actions/github-script@v7
         with:
           script: |
             const { run } = require('./.github/workflows/scripts/generate-playground-blueprint');
-            const artifactUrl = '${{ steps.create-playground-artifact-step.outputs.artifact-url }}';
-            run({ github, context, core, artifactUrl });
+            run({ github, context });

.github/workflows/scripts/generate-playground-blueprint.js

@@ -1,6 +1,6 @@
 const https = require( 'https' );
 
-const generateWordpressPlaygroundBlueprint = ( prNumber, artifactUrl ) => {
+const generateWordpressPlaygroundBlueprint = ( prNumber ) => {
 	const defaultSchema = {
 		meta: {
 			title: `Remote Data Blocks - PR #${ prNumber }`,
@@ -41,7 +41,7 @@ const generateWordpressPlaygroundBlueprint = ( prNumber, artifactUrl ) => {
 				pluginData: {
 					caption: 'Installing Remote Data Blocks',
 					resource: 'url',
-					url: `${ artifactUrl }`,
+					url: `https://playground.wordpress.net/plugin-proxy.php?org=Automattic&repo=remote-data-blocks&workflow=Build%20Live%20Branch&artifact=remote-data-blocks-${ prNumber }&pr=${ prNumber }`,
 				},
 				options: {
 					activate: true,
@@ -54,7 +54,7 @@ const generateWordpressPlaygroundBlueprint = ( prNumber, artifactUrl ) => {
 	return defaultSchema;
 };
 
-async function run( { github, context, core, artifactUrl } ) {
+async function run( { github, context } ) {
 	const commentInfo = {
 		owner: context.repo.owner,
 		repo: context.repo.repo,
@@ -74,9 +74,9 @@ async function run( { github, context, core, artifactUrl } ) {
 		}
 	}
 
-	const defaultSchema = generateWordpressPlaygroundBlueprint( context.issue.number, artifactUrl );
+	const defaultSchema = generateWordpressPlaygroundBlueprint( context.issue.number );
 
-	const url = `https://playground.wordpress.net/#${ JSON.stringify( defaultSchema ) }`;
+	const url = `https://playground.wordpress.net/#${ encodeURIComponent(JSON.stringify(defaultSchema)) }`;
 
 	const body = `
 ## Test using WordPress Playground