Fix lint issue

CITATION.cff

@@ -1,15 +1,15 @@
 cff-version: 1.2.0
-title: "Mermaid: Generate diagrams from markdown-like text"
+title: 'Mermaid: Generate diagrams from markdown-like text'
 message: >-
   If you use this software, please cite it using the metadata from this file.
 type: software
 authors:
   - family-names: Sveidqvist
     given-names: Knut
-  - name: "Contributors to Mermaid"
-repository-code: "https://github.com/mermaid-js/mermaid"
+  - name: 'Contributors to Mermaid'
+repository-code: 'https://github.com/mermaid-js/mermaid'
 date-released: 2014-12-02
-url: "https://mermaid.js.org/"
+url: 'https://mermaid.js.org/'
 abstract: >-
   JavaScript based diagramming and charting tool that renders Markdown-inspired
   text definitions to create and modify diagrams dynamically.