Fix contradiction: autopopulate.md §5.5 shows a transaction inside make()

[dimitri-yatsenko]

reference/specs/autopopulate.md §5.5 "Manual Transaction Control" shows opening a transaction inside make():

def make(self, key):
    with dj.conn().transaction:
        self.insert1(...)
        self.Part.insert(parts)

This directly contradicts explanation/computation-model.md ("Don't Open a Transaction Inside make()"), which states that populate() already holds a transaction for the call, so starting a nested one raises an error (DataJoint doesn't support nested transactions).

One of the two is wrong. Fix §5.5 — remove/replace the in-make() transaction example and align it with computation-model.md (a make() is already atomic; no explicit transaction is needed or allowed inside it).

From an internal datajoint-book → docs coverage review (priority P8).

[dimitri-yatsenko]

Addressed by #226, which fixed reference/specs/autopopulate.md §5.5 — removed the transaction-inside-make() example that contradicted computation-model.md (make() is already transactional; a nested one raises). Closing.