fix: Add back missing margin for paragraphs in booking providers

[MoritzWeber0]

In booking providers, each section has it's own paragraph. The CSS rule removed the margin for these paragraphs as it was the last element in relation to the parent.

This leads to missing margins, here in the example between the text and the Reservations heading:

After the change:

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[github-actions]

Hi there! 👋

Thank you for your contribution to the FIP Guide! 🚀
We appreciate your effort in making rail staff travel information more accessible. 🚄

Checklist before merging:

• Added a description to the Pull Request
• Checked the License of new pictures (non-commercial use without attribution)
• Modified content in English
• Modified content in German
• Modified content in French

[therobrob]

The css-rule is for the last paragraph in the article, because otherwise there is too much space and it doesn't look consistent. Maybe you could adjust the rule so that it doesn't affect the (booking) expanders? :)

[MoritzWeber0]

The css-rule is for the last paragraph in the article, because otherwise there is too much space and it doesn't look consistent. Maybe you could adjust the rule so that it doesn't affect the (booking) expanders? :)

I modified the rule, feel free to have another look.

[therobrob]

thanks :) i've added some more relevant cases, please have a look, if you agree :)

[MoritzWeber0]

thanks :) i've added some more relevant cases, please have a look, if you agree :)

The improvements look good. In addition, I removed the margins from all p elements in the sources, otherwise there is a lot of space between the list elements.