Update link in ADDING_PROJECTS.md to zenml-projects-backend

Author: htahir1

ADDING_PROJECTS.md

@@ -56,8 +56,7 @@ ENV ZENML_ENABLE_TUTORIAL=true
 
 ### When No Dockerfile is Needed
 
-If your project only requires Python dependencies listed in `requirements.txt`, **do not include a Dockerfile**. The projects backend will automatically build your project using the generic Dockerfile available at:
-[https://raw.githubusercontent.com/zenml-io/zenml-projects-backend/refs/heads/main/.docker/project.Dockerfile?token=GHSAT0AAAAAADISFM36XGBCROFV7ZUEFSUK2FMHITA](https://raw.githubusercontent.com/zenml-io/zenml-projects-backend/refs/heads/main/.docker/project.Dockerfile?token=GHSAT0AAAAAADISFM36XGBCROFV7ZUEFSUK2FMHITA)
+If your project only requires Python dependencies listed in `requirements.txt`, **do not include a Dockerfile**. The projects backend will automatically build your project using the generic Dockerfile available at the zenml-projects-backend repo.
 
 ## 🔧 Backend Integration