Fix failing nodejs (#675)

Summary:
Creating separate PR so that we can merge it quicker and don't have to wait for #672 to be reviewed.

Pull Request resolved: #675

Reviewed By: bilalsal

Differential Revision: D28713735

Pulled By: NarineK

fbshipit-source-id: 100694e691d98f3107e89f89e556dad5d0eabd73

Author: NarineK

scripts/install_via_conda.sh

@@ -40,7 +40,7 @@ conda install -y -c conda-forge black matplotlib pytest-cov sphinx-autodoc-typeh
 # install node/yarn for insights build
 conda install -y -c conda-forge yarn
 # nodejs should be last, otherwise other conda packages will downgrade node
-conda update -y --no-channel-priority -c conda-forge nodejs
+conda install -y --no-channel-priority -c conda-forge nodejs=14
 
 
 # build insights and install captum