Bump esptool from 4.5.1 to 4.6

Bumps [esptool](https://github.com/espressif/esptool) from 4.5.1 to 4.6.
- [Release notes](https://github.com/espressif/esptool/releases)
- [Commits](espressif/esptool@v4.5.1...v4.6)

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

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

requirements.txt

@@ -7,7 +7,7 @@ tzlocal==5.0.1    # from time
 tzdata>=2021.1  # from time
 pyserial==3.5
 platformio==6.1.7  # When updating platformio, also update Dockerfile
-esptool==4.5.1
+esptool==4.6
 click==8.1.3
 esphome-dashboard==20230516.0
 aioesphomeapi==13.9.0