Fix GitHub issue links rendered by sphinx

docs/contributing/features.md

@@ -8,7 +8,7 @@ to balance the value of the images to the Jupyter community with the cost of mai
 
 Please follow the process below to suggest a new feature for inclusion in one of the core stacks:
 
-1. Open a [GitHub feature request issue](https://github.com/jupyter/docker-stacks/issues/new?assignees=&labels=type%3AEnhancement&projects=&template=feature_request.yml)
+1. Open a [GitHub feature request issue](https://github.com/jupyter/docker-stacks/issues/new?template=feature_request.yml)
    describing the feature you'd like to contribute.
 2. Discuss with the maintainers whether the addition makes sense
    in [one of the core stacks](../using/selecting.md#core-stacks),

docs/contributing/issues.md

@@ -9,7 +9,7 @@ Please review the following guidelines when reporting your problem.
 - If you think your problem is unique to the Jupyter Docker Stacks images,
   please search the [jupyter/docker-stacks issue tracker](https://github.com/jupyter/docker-stacks/issues)
   to see if someone else has already reported the same problem.
-  If not, please open a [GitHub bug report issue](https://github.com/jupyter/docker-stacks/issues/new?assignees=&labels=type%3ABug&projects=&template=bug_report.yml)
+  If not, please open a [GitHub bug report issue](https://github.com/jupyter/docker-stacks/issues/new?template=bug_report.yml)
   and provide all the information requested in the issue template.
   Additionally, check the [Troubleshooting Common Problems](../using/troubleshooting.md) page in the documentation before submitting an issue.
 - If the issue you're seeing is with one of the open-source libraries included in the Docker images and is reproducible outside the images,