Fixing more broken links

[oruebel]

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[oruebel]

A few more broken links that we should decide on what to do:

What is the equivalent link on the new website for the following links?

• content/grants-and-projects/_index.md : http://www.nwb.org/progress-reports/
• content/events/kavli-salon-2014-chicago.md : https://www.nwb.org/event/kavli-salon-neurodata-without-borders-1
• content/events/hck03-2017-janelia.md : https://www.nwb.org/event/nwb-hackathon-july-2017/

Links that work but fail on linkcheck

• content/tools/analysis/nwbexplorer.md: https://nwbexplorer.v2.opensourcebrain.org (Too many redirects)
• content/_index.md: https://www.mathworks.com/ (403 Network error: Forbidden)
• content/events/hck05-2018-berkeley.md : https://drive.google.com/file/d/0B0OrtDJsFqMranF2eER2aTlvQmxXbmhaU2lrTjR5OXlYWlI4/view?usp=sharing (401, Network error: Unauthorized)

Invalid file:

• content/events/hck15-2023-janelia.md : file:///home/runner/work/neurodatawithoutborders.github.io/neurodatawithoutborders.github.io/content/events/nwb.org (Cannot find file)

@rly @bendichter thoughts on what I should do to fix these last few link check errors?