Fix reference format

Author: epoz

mkdocs.yml

@@ -8,10 +8,10 @@ nav:
   - Intro and Metadata: index.md
   - Widoco Documentation: /4culture/ontology/
   - NFDI Context: nfdi-context.md
-  - Scope and Structure: structure.md  
+  - Scope and Structure: structure.md
   - Domain Examples: domain-examples.md
-  - References: references.md 
-  
+  - References: references.md
+
 #  - Sample Applications: rdg.md
 #  - Sample Queries: queries.md
 #  - Tools:
@@ -29,9 +29,9 @@ markdown_extensions:
         # Mermaid diagrams
         - name: mermaid
           class: mermaid
-          format: !!python/name:pymdownx.superfences.fence_code_format
+          format: pymdownx.superfences.fence_code_format
 
 extra_javascript:
-#  - optionalConfig.js
+  #  - optionalConfig.js
   - https://cdn.jsdelivr.net/npm/mermaid@11.12.0/dist/mermaid.min.js
-  - extra-loader.js
+  - extra-loader.js