fix: fix created_by migration field

[KamilPawel]

Description

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have linked this PR to a ZenHub Issue.

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This change is 

[faucomte97]

Reviewed 1 of 3 files at r1, 1 of 2 files at r2, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @KamilPawel)

[codecov]

Codecov Report

Merging #1713 (2f38e50) into master (8e84d07) will increase coverage by 21.65%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1713       +/-   ##
===========================================
+ Coverage   66.30%   87.95%   +21.65%     
===========================================
  Files         179       38      -141     
  Lines        3659     1046     -2613     
  Branches      255      109      -146     
===========================================
- Hits         2426      920     -1506     
+ Misses       1201      103     -1098     
+ Partials       32       23        -9     

Impacted Files	Coverage Δ
aimmo/migrations/0030_update_created_by.py
aimmo/templatetags/players_utils.py
game_frontend/src/babylon/entities/index.ts
...tions/0018_set_worksheet_2_as_default_for_games.py
aimmo/avatar_examples/simple_avatar.py
game_frontend/src/components/icons/Clear.js
game_frontend/src/theme.js
game_frontend/src/img/1_investigate.svg
...mmo/migrations/0022_allow_games_to_have_no_name.py
game_frontend/src/components/Code/index.js
... and 133 more

[faucomte97]

Reviewed 1 of 1 files at r5, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @KamilPawel)