Help: Fix overlapping text in footnotes

In commit 038f4c12e3 (Utilities/Sphinx: Add hanging indent to version
notes, 2023-03-14, v3.27.0-rc1~322^2) we tweaked version notes to
improve readability. However, due to the way footnotes work, this
resulted in overlapping text elements when a footnote consists of a
version note. Adjust the styling to correct this issue.