Adding Devasthal Optical Telescope

[varghesereji]

Description

This pull request is to address ...

Fixes #

[hamogu]

Thanks for this pull request to add more data!
I do have a question about the coordinates though. When I input the coordinates into google maps (https://www.google.com/maps/@29.3620343,79.6859866,301m/data=!3m1!1e3!5m1!1e2?entry=ttu&g_ep=EgoyMDI2MDUyNy4wIKXMDSoASAFQAw%3D%3D) then it seems the coordinates are more centered on the ILMT than the DOT. That's probably just that the precision of the DOT is given only to full seconds in the website you referenced.
We can use that, but if it happens to fall on the ILMT, does it makes sense to set that as an alias?
If someone later comes with greater precision data, we could always split the two entries later. What do you think?

[hamogu]

@varghesereji And I apologize that it took me so long to get to this. I usually reply to PRs within a week, but it seems that the notification email from GitHub ended up in my spam folder and so I didn't see your PR. I'm sorry!

[varghesereji]

@hamogu Thanks for the suggestion. The coordinate I added before was actually given in the website. Now I have added the coordinates given in the google maps.
Thank you.

[hamogu]

Thank you!