Update list of free finnish programming courses

[wesenbergg]

What does this PR do?

✅ Add resource(s) | ✅ Remove resource(s) | Add info | Improve repo

For resources

Description

• FITech courses
• Update old University of Helsinki course from 2017 to 2025

Why is this valuable (or not)?

How do we know it's really free?

Part of DEFA

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

• University of Helsinki. Online course.
• FITech. List of courses.

Checklist:

• Read our contributing guidelines.
• 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/courses/free-courses-fi.md
24:1-24:97  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2      remark-lint
24:3-24:75  warning  Remove trailing slash (https://ohjelmointi-25.mooc.fi)                 no-url-trailing-slash  remark-lint

[eshellman]

Thanks, and welcome to free-programming-books!