fix missing links in docs 'applications' page

[deargle]

a lot of supposed-to-be-links on this page linked to nothing at all

[codecov]

Codecov Report

Merging #241 (7545c84) into master (e9d3d2b) will not change coverage.
The diff coverage is n/a.

❗ Current head 7545c84 differs from pull request most recent head 637689c. Consider uploading reports for the commit 637689c to get more accurate results

@@           Coverage Diff           @@
##           master     #241   +/-   ##
=======================================
  Coverage   80.32%   80.32%           
=======================================
  Files          11       11           
  Lines         864      864           
  Branches      189      189           
=======================================
  Hits          694      694           
  Misses        138      138           
  Partials       32       32           

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