Fix repo links

[ethantkoenig]

Fixes incorrect links in the repository listing of a user profile, as described #3035.

This PR does not address the other points raised in #3035, e.g.

• whether it makes sense to have "Show more repos" link to a user's profile page
• whether it makes sense to initially show only a user's repos on their profile page, but include collaborative repos when searching on the profile page

Therefore, we probably should not close #3035 if/when this PR merged.

[codecov-io]

Codecov Report

Merging #3093 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3093   +/-   ##
=======================================
  Coverage   33.26%   33.26%           
=======================================
  Files         273      273           
  Lines       39954    39954           
=======================================
  Hits        13290    13290           
+ Misses      24768    24763    -5     
- Partials     1896     1901    +5

Impacted Files	Coverage Δ
models/repo_indexer.go	47.52% <0%> (-1.49%)	⬇️
models/repo.go	38.15% <0%> (-0.19%)	⬇️
models/issue.go	45.05% <0%> (+0.19%)	⬆️
models/error.go	32.72% <0%> (+0.61%)	⬆️
models/issue_indexer.go	67.53% <0%> (+2.59%)	⬆️

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[lafriks]

LGTM

[lunny]

LGTM

[lunny]

Also fix #3148