Fix contributor docs link

Author: darsnack

README.md

@@ -35,7 +35,7 @@
 | [ConvNeXt](https://arxiv.org/abs/2201.03545)     | [`ConvNeXt`](https://fluxml.ai/Metalhead.jl/dev/docstrings/Metalhead.ConvNeXt.html)       | N            |
 | [ConvMixer](https://arxiv.org/abs/2201.09792)    | [`ConvMixer`](https://fluxml.ai/Metalhead.jl/dev/docstrings/Metalhead.ConvMixer.html)     | N            |
 
-To contribute new models, see our [contributing docs](https://fluxml.ai/Metalhead.jl/dev/docs/developer-guide/contributing.html).
+To contribute new models, see our [contributing docs](https://fluxml.ai/Metalhead.jl/dev/docs/dev-guide/contributing.html).
 
 ## Getting Started