Update Part-1.md

[braim23]

This is my second PR for the Creating the Server-side documentation: https://docs.abp.io/en/abp/latest/Tutorials/Part-1?UI=MVC&DB=EF

Every time I add a 'the' is probably mainly there's a noun after the name Navigate to the "blabla()" method.
whenever there's "method/class/project" I'm obliged to add a "the"

The most important changes I'd like to have your attention to are these two:


Feel free to cherry pick these two changes according to your liking.

The other ones are simpler.

[hikalkan]

Thanks, great!