Fix: updated lower bound of MAR04356 to make it reversible

[liamkelley93]

Main improvements in this PR:

This change fixes #990 by changing the lower bounds of reaction MAR04356 to -1000 in the model .yml file, thereby making the reaction reversible. This matches the real biology as highlighted in the issue.

I hereby confirm that I have:

• Tested my code on my own computer for running the model
• Selected develop as a target branch
• Any removed reactions and metabolites have been moved to the corresponding deprecated identifier lists

[JHL-452b]

I'm not sure why the check failed, maybe you chose the wrong branch to merge? In other PRs, develop was selected instead of SysBioChalmers:develop. Maybe you can try to adjust the target branch.

[liamkelley93]

@JHL-452b I selected develop from the dropdown, which then displays as SysBioChalmers:develop, so I don't know how else to do it, there are no other ones with develop in the name. Any ideas on that? I can't imagine what else could cause the error, I literally only changed the lower bound in one line.