fix hljs unintenionally highlighting commit links

[silverwind]

With Ref: <url> in commit body:

Before:

After:

[mrsdizzie]

Will need updated unit tests to match new output, but looks good otherwise!

[silverwind]

Oops, unit tests should be fixed now.

[codecov-io]

Codecov Report

Merging #7244 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #7244      +/-   ##
==========================================
- Coverage   40.98%   40.98%   -0.01%     
==========================================
  Files         462      462              
  Lines       62584    62585       +1     
==========================================
- Hits        25651    25650       -1     
+ Misses      33574    33573       -1     
- Partials     3359     3362       +3

Impacted Files	Coverage Δ
modules/markup/html.go	80.71% <100%> (+0.04%)	⬆️
modules/process/manager.go	76.81% <0%> (-4.35%)	⬇️
modules/log/file.go	75.52% <0%> (-2.1%)	⬇️
modules/log/event.go	65.64% <0%> (+1.02%)	⬆️
models/unit.go	67.56% <0%> (+5.4%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a205155...7cfa1b3. Read the comment docs.