Enable emoji for wiki view

[haytona]

Enable emoji for wiki page content. It is enabled in the edit preview so the view should match.

[lafriks]

CI failure not related to PR so LGTM

[ethantkoenig]

LGTM

[codecov-io]

Codecov Report

Merging #3158 into master will increase coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3158      +/-   ##
==========================================
+ Coverage   34.57%   34.74%   +0.17%     
==========================================
  Files         276      276              
  Lines       39945    39945              
==========================================
+ Hits        13809    13880      +71     
+ Misses      24155    24071      -84     
- Partials     1981     1994      +13

Impacted Files	Coverage Δ
modules/indexer/repo.go	60.86% <0%> (-6.96%)	⬇️
models/repo_indexer.go	51.94% <0%> (-0.98%)	⬇️
models/repo.go	41.47% <0%> (+0.18%)	⬆️
models/lfs.go	28.26% <0%> (+2.17%)	⬆️
modules/lfs/server.go	35.01% <0%> (+14.32%)	⬆️
modules/lfs/content_store.go	43.75% <0%> (+35.93%)	⬆️

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