Prepare for next esp-hal release / esp-wifi release

[bjoernQ]

• there are some links to docs.rs which we cannot change before we have documentation available for the next release (i.e. after that release)**
• some of the solutions are available online via Wokwi - I have no idea how we can update them. I guess they are hosted on wokwi.com and owned by Sergio, so only he can change it. We shouldn't update them before the next esp-hal release anyways

** these links

❯ rg docs.rs/esp32
book\src\03_5_http_client.md
95:[timer]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/systimer/index.html
96:[clock]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/clock/index.html

book\src\03_4_interrupt.md
61:[listen]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/prelude/trait._esp_hal_gpio_Pin.html#method.listen
64:[possible interrupts]: https://docs.rs/esp32c3/0.5.1/esp32c3/enum.Interrupt.html
65:[events]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/gpio/enum.Event.html#variants

book\src\03_3_button.md
39:[into-pull-up-input]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/gpio/struct.GpioPin.html#method.into_pull_up_input
40:[into-push-pull-output]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/gpio/struct.GpioPin.html#method.into_push_pull_output

book\src\03_2_blinky.md
44:[into-push-pull-output]: https://docs.rs/esp32c3-hal/latest/esp32c3_hal/gpio/struct.GpioPin.html#method.into_push_pull_output

[SergioGasquez]

Changes LGTM! Thanks for taking care of this!

[bjoernQ]

Just waiting for next esp-wifi release which is blocked by a problem with ESP32-S2

[bjoernQ]

This should now be ready to merge

[MabezDev]

LGTM, thank you!

[SergioGasquez]

LGTM!

[SergioGasquez]

Forgot to update here: All the Wokwi examples are now updated to match the source code in the training