fix(esp32): Add missing vflip status in esp32-cam example

[h-2-0]

Toggle switch for V-Flip will now indicate correct status in frontend when loading the webpage

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Description of Change

PR fixes a minor bug in the webpage for the CameraWebServer example, where the toggle switch is not updated with the current status from the ESP32.

Tests scenarios

I have tested my Pull Request on Arduino-esp32 core v3.2.0 with ESP32-S (ESP32-CAM) with this scenario

Related links

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