[website] Update the project description on home page
### Motivation
Missing the word "project" for the Pulsar description on home page.
### Modifications
Update it.
@@ -180,7 +180,7 @@ const siteConfig = {
projectDescription: `
Apache Pulsar is a cloud-native, distributed messaging and streaming platform originally
- created at Yahoo! and now a top-level Apache Software Foundation
+ created at Yahoo! and now a top-level Apache Software Foundation project
`,
markdownPlugins: [
