Bump platformio from 6.1.19 to 6.2.0

Bumps [platformio](https://github.com/platformio/platformio) from 6.1.19 to 6.2.0.
- [Release notes](https://github.com/platformio/platformio/releases)
- [Changelog](https://github.com/platformio/platformio-core/blob/develop/HISTORY.rst)
- [Commits](https://github.com/platformio/platformio/compare/v6.1.19...v6.2.0)

---
updated-dependencies:
- dependency-name: platformio
  dependency-version: 6.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -9,7 +9,7 @@ colorama==0.4.6
 tzlocal==5.4.4    # from time
 tzdata>=2026.3  # from time
 pyserial==3.5
-platformio==6.1.19
+platformio==6.2.0
 esptool==5.4.0
 click==8.3.3
 aioesphomeapi==46.4.0