add section on dealing with model uncertainty in tutorial

[baggepinnen]

No description provided.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (29abee4) 91.21% compared to head (0e25364) 92.72%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #884      +/-   ##
==========================================
+ Coverage   91.21%   92.72%   +1.51%     
==========================================
  Files           5        5              
  Lines         330      330              
==========================================
+ Hits          301      306       +5     
+ Misses         29       24       -5     

see 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[JuliaControlBot]

This is an automated message.
Plots were compared to references. 11/11 images have changed, see differences below.
After pulling this PR, please update the reference images by creating a PR to ControlExamplePlots.jl here.

Difference	Reference Image	New Image
❌ 0.047
✔️ 0.011
✔️ 0.001
✔️ 0.001
✔️ 0.007
✔️ 0.003
✔️ 0.0
⚠️ 0.028
❌ 0.06
✔️ 0.0
⚠️ 0.017