Fix a spurious space in the cleveref firstaid

[u-fischer]

Status of pull request

• Ready to merge

Checklist of required changes before merge will be approved

• [x] Test file(s) added (updated)
• [x] Version and date string updated in changed source files
• [x] Relevant \changes entries in source included
• [x] Relevant changes.txt updated
• [n/a] Rollback provided (if necessary)?
• [n/a] ltnewsX.tex (and/or latexchanges.tex) updated

[muzimuzhi]

May I ask when will the new version of firstaid be released, assuming it can be updated solely?

Quite some documents use cleveref thus are affected, including the tcolorbox manual (see https://github.com/T-F-S/tcolorbox/issues/300#issuecomment-2483556386).