esp32_camera: Set framebuffer task prio to 1

[gaaf]

What does this implement/fix?

Prio 0 is the lowest possible, competing with the idle task. All non-idle tasks should have a prio > 0. If there's another task at prio > 0 around (like the application's loop task), it is possible the framebuffee task never gets executed.

Perhaps the prio should even be above 1, to keep avoid missing frames.

This came to attention during review of eliminating the delay in the application's main loop in case the loop is already slow (#5869).

Code is untested due to lack of hardware.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes

Pull request in esphome-docs with documentation (if applicable): esphome/esphome-docs#

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in esphome-docs.