Refreshes lastTestedNVDAVersion to NVDA 2026.2, the current stable release. The previous manifest claimed 2026.3.0 since the first commit, but NVDA 2026.3 has not shipped -- NV Access's latest release is 2026.2 (published 2026-08-31), and 2026.3 exists only as an experimental API version in NV Access's addon-datastore metadata. Nothing can truthfully be tested against a release that does not exist.