Updated pyomo N2 in docs

Author: johnjasa

CHANGELOG.md

@@ -18,6 +18,7 @@
 - Rename `n_control_window` to `n_control_window_hours` for unit clarity [PR 712](https://github.com/NatLabRockies/H2Integrate/pull/712)
 - Update N2 diagram for demand openloop control from static and outdated to dynamic and interactive [PR 714](https://github.com/NatLabRockies/H2Integrate/pull/714)
 - Added basic check of 4-length connections in `technology_interconnections` [PR 720](https://github.com/NatLabRockies/H2Integrate/pull/720)
+- Update N2 diagram for Pyomo heuristic control from static image to dynamic and interactive embedded diagram [PR 726](https://github.com/NatLabRockies/H2Integrate/pull/726)
 
 ## 0.8 [April 15, 2026]
 - Updated README and docs intro page with expanded H2I description, reorganized sections, and streamlined installation instructions [PR 677](https://github.com/NatLabRockies/H2Integrate/pull/677)