docs: Fix MySQL create database syntax

[abh]

Signed-off-by: Ask Bjørn Hansen [email protected]

[codecov-io]

Codecov Report

Merging #10436 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #10436      +/-   ##
==========================================
+ Coverage   43.67%   43.68%   +<.01%     
==========================================
  Files         586      586              
  Lines       81389    81389              
==========================================
+ Hits        35550    35556       +6     
+ Misses      41439    41433       -6     
  Partials     4400     4400

Impacted Files	Coverage Δ
modules/git/utils.go	65.67% <0%> (-4.48%)	⬇️
modules/git/repo.go	46.78% <0%> (-2.3%)	⬇️
modules/indexer/stats/db.go	50% <0%> (ø)	⬆️
models/notification.go	64.13% <0%> (+0.84%)	⬆️
modules/log/event.go	65.64% <0%> (+1.02%)	⬆️
modules/git/command.go	89.56% <0%> (+2.6%)	⬆️
services/pull/check.go	53.04% <0%> (+3.04%)	⬆️

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[silverwind]

Backticks would be the canonical way, but this is fine too.

[abh]

@silverwind I thought backticks would have too many way to get mangled between document conversions, cut'n'paste, etc to be worth it. If someone chooses a database name that needs backticks they'd have to figure that out without the gitea documentation helping them. :-)