Remove unnecessary quotation marks

Editor assessment

The subject states exactly what changed: unnecessary quotation marks were removed from the curriculum. It is fully understandable without the diff, and the fix type and curriculum scope are accurate for a content cleanup. No body is present, which is entirely justifiable for a small cosmetic correction; there is no motivation a reader needs beyond what the subject already says. The PR reference is the only footer and it is well formed. Style is clean throughout: imperative mood, no trailing period, comfortable length, no ticket junk, consistent language. A small change communicated exactly as a small change should be, with nothing to flag and nothing missing.