Docs: Fixed some typos in docs

[kangtegong]

While reading documentaions for the sake of gsoc, I found these small typos in docs. This commit amends those typos.

Signed-off-by: Kang Minchul [email protected]

[codecov-commenter]

Codecov Report

Merging #3680 (614273e) into master (96968d6) will decrease coverage by 1.40%. The diff coverage is 33.39%.

@@            Coverage Diff             @@
##           master    #3680      +/-   ##
==========================================
- Coverage   72.93%   71.53%   -1.41%     
==========================================
  Files          83       20      -63     
  Lines        5368     3235    -2133     
==========================================
- Hits         3915     2314    -1601     
+ Misses       1453      921     -532     

Impacted Files	Coverage Δ
frontend/src/js/controllers/authCtrl.js	53.91% <6.38%> (-12.95%)	:arrow_down:
frontend/src/js/controllers/profileCtrl.js	79.76% <20.00%> (-13.10%)	:arrow_down:
frontend/src/js/controllers/permissionCtrl.js	36.36% <22.22%> (-63.64%)	:arrow_down:
frontend/src/js/controllers/challengeCtrl.js	63.54% <31.97%> (-10.15%)	:arrow_down:
frontend/src/js/controllers/updateProfileCtrl.js	82.55% <44.44%> (-10.30%)	:arrow_down:
frontend/src/js/controllers/challengeListCtrl.js	95.74% <50.00%> (+1.06%)	:arrow_up:
...ntend/src/js/controllers/challengeHostTeamsCtrl.js	70.50% <66.66%> (-1.18%)	:arrow_down:
frontend/src/js/controllers/teamsCtrl.js	71.17% <75.00%> (ø)
frontend/src/js/controllers/ChallengeInviteCtrl.js	100.00% <100.00%> (ø)
frontend/src/js/controllers/SubmissionFilesCtrl.js	95.45% <100.00%> (ø)
... and 69 more

Impacted Files	Coverage Δ
frontend/src/js/controllers/authCtrl.js	53.91% <6.38%> (-12.95%)	:arrow_down:
frontend/src/js/controllers/profileCtrl.js	79.76% <20.00%> (-13.10%)	:arrow_down:
frontend/src/js/controllers/permissionCtrl.js	36.36% <22.22%> (-63.64%)	:arrow_down:
frontend/src/js/controllers/challengeCtrl.js	63.54% <31.97%> (-10.15%)	:arrow_down:
frontend/src/js/controllers/updateProfileCtrl.js	82.55% <44.44%> (-10.30%)	:arrow_down:
frontend/src/js/controllers/challengeListCtrl.js	95.74% <50.00%> (+1.06%)	:arrow_up:
...ntend/src/js/controllers/challengeHostTeamsCtrl.js	70.50% <66.66%> (-1.18%)	:arrow_down:
frontend/src/js/controllers/teamsCtrl.js	71.17% <75.00%> (ø)
frontend/src/js/controllers/ChallengeInviteCtrl.js	100.00% <100.00%> (ø)
frontend/src/js/controllers/SubmissionFilesCtrl.js	95.45% <100.00%> (ø)
... and 69 more

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[kangtegong]

If there's anything I can do more, I'll amend this commit right away. Thank you.