Adds markdown linting (dead urls)

[petethepig]

No description provided.

[codecov]

Codecov Report

Merging #270 (b056a1a) into main (34fc1b4) will decrease coverage by 0.09%.
The diff coverage is n/a.

❗ Current head b056a1a differs from pull request most recent head 1ef0dd3. Consider uploading reports for the commit 1ef0dd3 to get more accurate results

@@            Coverage Diff             @@
##             main     #270      +/-   ##
==========================================
- Coverage   53.85%   53.77%   -0.08%     
==========================================
  Files          89       89              
  Lines        3638     3638              
==========================================
- Hits         1959     1956       -3     
- Misses       1479     1482       +3     
  Partials      200      200              

Impacted Files	Coverage Δ
pkg/agent/session.go	63.94% <0.00%> (-2.45%)	⬇️

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