Fix segmentation in 1-Index

[ignotus666]

Short description of changes Fixes the broken up sentences in 1-Index.html (now 1-Index.md). Makes it easier to edit text in future too.

Context: Fixes an issue? Related issues Fixes: #934

Status of this Pull Request Tested locally and seems to be working.

What is missing until this pull request can be merged? Further testing by someone else might be advisable.

Does this need translation?

YES

Checklist

• [x] I've verified that this Pull Request follows the general code principles
• [x] I waited some time after this Pull Request was opened and all GitHub checks completed without errors.
• [x] I'm sure that this Pull Request goes to the correct branch

[ignotus666]

Interesting approach. Can you think of anything where index.md doesn't work while the html would?

In a local build everything seems to be working fine. If someone else tests it maybe they can spot something I missed.