Do not show bio if it is null

[LinuxSuRen]

No description provided.

[codecov-commenter]

Codecov Report

Merging #33 (bb1748c) into master (c5274e6) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #33   +/-   ##
=======================================
  Coverage   92.88%   92.88%           
=======================================
  Files           3        3           
  Lines         281      281           
=======================================
  Hits          261      261           
  Misses         14       14           
  Partials        6        6           

Flag	Coverage Δ
unittests	92.88% <100.00%> (ø)

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Impacted Files	Coverage Δ
function/github.go	100.00% <100.00%> (ø)

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