finance/odoo: Fix pkg-plist with non-default python

Incorrect auto-substitution - "311" was replaced with "%%PYTHON_SUFFIX%%".

PR: 294248
Approved by: blanket (fix build)
Sponsored by: UNIS Labs
MFH: 2026Q2

(cherry picked from commit ea944aa0d4683c78c94b7bd1ae883d92d5e2795d)