Release 2.7.7

[kmich]

Release 2.7.7

This release contains the two changes merged since 2.7.6:

• Update the vanilla windrose dashboard example for lovelace-windrose-card v2.x (period_back: -24h) from Change windrose data_period option: hours_to_show -> period_back #151.
• Fix Penman-Monteith ET₀ using instantaneous solar radiation as a daily mean, with completed-day solar irradiation persistence, from ET₀ Penman-Monteith fed instantaneous solar radiation instead of daily mean (~3× overestimate) #152 / Fix Penman-Monteith daily solar radiation input (#152) #153.

Also bumps manifest.json and pyproject.toml to 2.7.7 and promotes the changelog section to the 2026-09-19 release.