Update free-courses-pl.md

[SrishBansal]

Added a new Python Programming tutorial in polish which includes all the major concepts

What does this PR do?

Add resource(s) |

For resources

Description

Added a new Python Programming tutorial in polish which includes all the major concepts. Easy to understand

Why is this valuable (or not)?

How do we know it's really free?

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

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-pl.md
117:1-123:87  warning  Alphabetical ordering: swap l.123 and l.122  alphabetize-lists  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-pl.md
117:1-123:141  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-pl.md
117:1-123:139  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-pl.md
117:1-123:141  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-pl.md
117:1-123:112  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint

[eshellman]

Don't invent titles! Use the title given by the resource.
For youtube, we prefer "playlist" links and the name of the producer/creator. docs/CONTRIBUTING.md#platforms-and-access-notes
remove time code from url

[eshellman]

why did you remove the author attribution?

[eshellman]

2 empty lines after sections

[eshellman]

why did you remove author attribution?

[SrishBansal]

I removed it out while trying to fix the linter error and realized it was already there before my pull request. I made some adjustments to investigate the issue that's preventing deployment.

[eshellman]

why di you remove author attribution?

[github-actions]

Linter failed, fix the error(s):

free-programming-books/courses/free-courses-pl.md
117:1-123:111  warning  Alphabetical ordering: swap l.118 and l.117                            alphabetize-lists  remark-lint
117:1-123:111  warning  Alphabetical ordering: swap l.123 and l.122                            alphabetize-lists  remark-lint
117:1-123:111  warning  Incorrect number of blank lines between last section and next heading  blank-lines-1-0-2  remark-lint