feat: add missing blog "bpmn-visualization 1st anniversary" (#1390)

Author: tbouffard

src/content/PostsContent.tsx

@@ -136,6 +136,15 @@ const posts: PostContent[] = [
     date: 'May 2021',
     time: 7,
   },
+  {
+    title: 'The bpmn-visualization project celebrates its 1st anniversary',
+    text: 'To celebrate the first year of our work on the bpmn-visualization library, here is a look back.',
+    cover:
+      'https://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fqfaqgib7iz9v1ehrppv8.png', // from the dev.to article
+    url: 'https://www.linkedin.com/pulse/bpmn-visualization-project-celebrates-its-1st-thomas-bouffard/', // https://dev.to/process-analytics/the-bpmn-visualization-project-celebrates-its-1st-anniversary-4ae2
+    date: 'May 2021',
+    time: 4,
+  },
   {
     title:
       'Automated visual regression testing with TypeScript, Playwright and Jest', // original title which would have been truncated: 'Automated visual regression testing with TypeScript, Playwright, Jest and Jest Image Snapshot'