Is there a way to modify the width of the content?

[overfloddedwithCss]

First of all, thank you guys for creating and maintaining this awesome theme!

My problem: I need to highlight some headings with a special icon on the right side to underline that a certain chapter belongs to a certain version. Unfortunately, long titles + symbol cause a line break.

See screenshots below:

As far as I can tell, the width of the content is fixed, but I'm looking for a way to modify it to avoid line breaks. I stumbled across this solution for the Read the docs theme. Out of curiosity, I tried some of the suggestions, but none of them worked.
Is there a way to change the content width?