Added .NET Rocks! to EN podcasts list

[lordpansar]

What does this PR do?

Add resource(s)

IMPORTANT

• Read our contributing guidelines.
• Is this a revision of a previously submitted PR? If so, STOP! Go back, reopen the PR, and add commit(s) the branch you previously submitted. Please don't make the job of reviewing more difficult by hiding previous work.

For resources

Description

Added .NET Rocks! to EN podcast list

Why is this valuable (or not)?

It adds another resource to the library

How do we know it's really free?

Anyone can listen to the podcast for free through their preferred podcast service/app

For book lists, is it a book? For course lists, is it a course? etc.

This is a podcast

Checklist:

• Search for duplicates.
• Include author(s) and platform where appropriate.
• Put lists in alphabetical order, correct spacing.
• Add needed indications (PDF, access notes, under construction).
• Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[github-actions]

Linter failed, fix the error(s):

free-programming-books/casts/free-podcasts-screencasts-en.md
49:1-54:123  warning  Alphabetical ordering: swap l.50 and l.49  alphabetize-lists  remark-lint