Upgrade nbresuse to not shadow /metrics

Brings in jupyter-server/jupyter-resource-usage#68 so
we can move towards getting prometheus metrics from notebooks.

Author: yuvipanda

infra-requirements.txt

@@ -14,7 +14,8 @@ nbconvert==5.6.1
 nbformat==5.0.7
 jupyterlab==2.2.4
 nbgitpuller==0.9.0
-nbresuse==0.3.6
+# Temporary fix until https://github.com/yuvipanda/nbresuse/pull/68/commits/87c306f7a604e866e83c6b1f6d4cc8b4015143c6 is merged
+git+https://github.com/yuvipanda/nbresuse.git@87c306f7a604e866e83c6b1f6d4cc8b4015143c6
 jupyterhub==1.1.0
 appmode==0.8.0
 ipywidgets==7.5.1