Fix Web API port

[watahani]

Web API is hosted port 44351 by default

Purpose

Fix README.md

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

How to Test

N/A

What to Check

N/A

Other Information

N/A

[kalyankrishna1]

We appreciate you taking time to propose a fix, but Visual Studio/dotnet core engine will change port as assigned in the project file if that port is already busy.
So, if we accept this change, we'd just break another set of developers for whom the specified port is free.