Fix broken anchor links

[iamfazakb]

Just changed some anchor links to directly take you to their API documentation instead of just leaving you at the top of the page. The pages and their sections were:
https://py-pdf.github.io/fpdf2/TextRegion.html#general-operation
https://py-pdf.github.io/fpdf2/Margins.html#margins
https://py-pdf.github.io/fpdf2/PageFormatAndOrientation.html#page-layout-zoom-level
https://py-pdf.github.io/fpdf2/TextColumns.html#text-columns
https://py-pdf.github.io/fpdf2/Images.html#output-intents

Fixes #1876

• I have confirmed the links that I modified work correctly

Is writing changes to the documentations in CHANGELOG.md necessary?

• A mention of the change is present in CHANGELOG.md

• This PR is ready to be merged

This is my first time contributing and I was really nervous. That's why I decided to start small to get used to it. I would really appreciate advice and criticism.

By submitting this pull request, I confirm that my contribution is made under the terms of the GNU LGPL 3.0 license.

[iamfazakb]

I also found some links that lead to the documentation instead of the API reference.

For example: https://py-pdf.github.io/fpdf2/Links.html#hyperlink-with-write_html
In this section, FPDF.write_html takes to the page https://py-pdf.github.io/fpdf2/HTML.html instead of the API documentation.

Just wanted to ask if this is intentional.

[andersonhc]

Just wanted to ask if this is intentional.

Doesn't look intentional to me - linking to the API reference would make more sense. Do you want to add this change?

Also, can you add a quick CHANGELOG.md entry saying you fixed several links on the docs?

I'm good to merge after that.

[iamfazakb]

Doesn't look intentional to me - linking to the API reference would make more sense. Do you want to add this change?

Yes, I can add this change I'll also add a CHANGELOG.md entry stating the changes.
Would just a single line be enough saying that I fixed a few broken anchor links.

[andersonhc]

Doesn't look intentional to me - linking to the API reference would make more sense. Do you want to add this change?

Yes, I can add this change I'll also add a CHANGELOG.md entry stating the changes. Would just a single line be enough saying that I fixed a few broken anchor links.

Yes. One line is more than enough

[iamfazakb]

@andersonhc, I have completed the changes. Should I do anything else?
Is mentioning maintainers like this frowned upon?

[andersonhc]

@allcontributors please add @iamfazakb for docs

[allcontributors]

@andersonhc

I've put up a pull request to add @iamfazakb! 🎉

[andersonhc]

@andersonhc, I have completed the changes. Should I do anything else? Is mentioning maintainers like this frowned upon?

No worries about mentioning people :)

The PR has been merged. Thank you for your contribution.