Use documentation IPs for example IPs

[abh]

See https://tools.ietf.org/html/rfc5737

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

[codecov-io]

Codecov Report

Merging #10434 into master will decrease coverage by 0.06%.
The diff coverage is 42.85%.

@@            Coverage Diff             @@
##           master   #10434      +/-   ##
==========================================
- Coverage   43.68%   43.62%   -0.07%     
==========================================
  Files         586      586              
  Lines       81389    81391       +2     
==========================================
- Hits        35552    35504      -48     
- Misses      41433    41487      +54     
+ Partials     4404     4400       -4

Impacted Files	Coverage Δ
models/token.go	73.77% <0%> (-6.56%)	⬇️
models/issue_watch.go	58.53% <50%> (-5.22%)	⬇️
services/pull/check.go	32.92% <0%> (-17.69%)	⬇️
modules/queue/workerpool.go	54.8% <0%> (-3.21%)	⬇️
services/pull/temp_repo.go	29.05% <0%> (-2.57%)	⬇️
services/pull/patch.go	60.37% <0%> (-2.52%)	⬇️
models/pull.go	41.82% <0%> (-0.56%)	⬇️
models/gpg_key.go	54.81% <0%> (-0.56%)	⬇️
models/error.go	29.23% <0%> (+0.51%)	⬆️
... and 2 more

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