Updated Sphinx-Gallery heating tank FMU examples

[jhirji-g]

Updated heating_tank_fmu and heating_tank_fmu_fmu to reflect new case setup

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.91%. Comparing base (aab8b9c) to head (b97a26c). Report is 10 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #379 +/- ## ========================================== - Coverage 85.04% 84.91% -0.13% ========================================== Files 41 41 Lines 2634 2632 -2 ========================================== - Hits 2240 2235 -5 - Misses 394 397 +3 ```