Fix link Symfony 5 and add link Symfony 6 multiple langues

[jatniel]

What does this PR do?

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

Add resource(s) & Add info & Improve repo

For resources

Description

Fix link Symfony 5 and add link Symfony 6

Why is this valuable (or not)?

Add the correct link for version 5 and also add the link for version 6

How do we know it's really free?

The official website allows you to read online free of charge

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

It is an online book

Checklist:

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

Follow-up

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

[eshellman]

Be sure to check the free-programming-books-lint output for linter errors. Alphabetical order and spacing are the most common problems.

[eshellman]

Be sure to check the free-programming-books-lint output for linter errors. Alphabetical order and spacing are the most common problems.

Try not to start new PRs to replace PRs that have been reviewed asking for changes. This wastes the reviewer's time. Just revise your PR.

[jatniel]

Be sure to check the free-programming-books-lint output for linter errors. Alphabetical order and spacing are the most common problems.

Try not to start new PRs to replace PRs that have been reviewed asking for changes. This wastes the reviewer's time. Just revise your PR.

Thanks for your help

I do not detect the problem and I have run a linter and no problem, i.e. I do not see the blanks, and I have also put in alphabetical numerical order.

I can't find exactly where the problem may be. Any ideas? Thanks

[eshellman]

please read the error messages from the linter, and look at the diffs in github.

from CONTRIBUTING.md:

Formatting All lists are .md files. Try to learn Markdown syntax. It's simple! All the lists start with an Index. The idea is to list and link all sections and subsections there. Keep it in alphabetical order. Sections are using level 3 headings (###), and subsections are level 4 headings (####). The idea is to have:

2 empty lines between last link and new section. 1 empty line between heading & first link of its section. 0 empty line between two links. 1 empty line at the end of each .md file.

[github-actions[bot]]

Oh no 😟! Conflicts have been found.

Please 🙏, take a moment and address the merge conflicts of your pull request before we can evaluate it again.

Thanks in advance for your effort and patience ❤️!

[github-actions[bot]]

This Pull Request has been automatically marked as stale because it has not had recent activity during last 60 days :sleeping:

It will be closed in 30 days if no further activity occurs. To unstale this PR, draft it, remove stale label, comment with a detailed explanation or push more commits.

There can be many reasons why some specific PR has no activity. The most probable cause is lack of time, not lack of interest.

Thank you for your patience :heart:

[github-actions[bot]]

This Pull Request has been automatically closed because it has been inactive during the last 30 days since being marked as stale.

As author or maintainer, it can always be reopened if you see that carry on been useful.

Anyway, thank you for your interest in contribute :heart: