rtd fix

mkdocs.yml

@@ -39,7 +39,7 @@ nav:
   - Set-NTFSOwner: Cmdlets/Set-NTFSOwner.md
   - Set-NTFSSecurityDescriptor: Cmdlets/Set-NTFSSecurityDescriptor.md
   - Test-Path2: Cmdlets/Test-Path2.md
-- Contributing: Contributing.md
+- Contributing:
   - Getting Started: Contributing/01-Getting-Started.md
   - Writing: Contributing/02-Writing.md
   - Style Guide: Contributing/03-Style-Guide.md