Fix typo in recently merged PR

[Mv77]

The PR with idiosyncratic risky return draws (#1250) had a typo: riksy instead of risky.

This PR fixes the typo

• Tests for new functionality/models or Tests to reproduce the bug-fix in code.
• Updated documentation of features that add new functionality.
• Update CHANGELOG.md with major/minor changes.

[alanlujan91]

@Mv77 changelog also has it misspelled

[Mv77]

@Mv77 changelog also has it misspelled

haha yeah, just fixed it. Thanks for the attention to detail!

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (9dbf39a) 73.31% compared to head (2c6e26a) 73.31%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1253   +/-   ##
=======================================
  Coverage   73.31%   73.31%           
=======================================
  Files          76       76           
  Lines       12548    12548           
=======================================
  Hits         9199     9199           
  Misses       3349     3349           

Impacted Files	Coverage Δ
HARK/ConsumptionSaving/ConsRiskyAssetModel.py	40.74% <100.00%> (ø)
...ConsumptionSaving/tests/test_ConsPortfolioModel.py	100.00% <100.00%> (ø)

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