Fix CITATION syntax (#11131)

Author: NotMyFault

CITATION.cff

@@ -1,8 +1,11 @@
 cff-version: 1.2.0
-title: Jenkins
+title: "Jenkins"
 type: software
 repository-code: "https://github.com/jenkinsci/jenkins"
 url: "https://jenkins.io/"
+authors:
+  - name: "Jenkins contributors"
+    affiliation: "Jenkins project"
 abstract: >-
   In a nutshell, Jenkins is the leading open-source automation server.
   Built with Java, it provides over 2,000 plugins to support automating virtually anything,