Update bootloaders to release/v5.5

[SergioGasquez]

Update bootloaders to release/v5.5 (rev d66ebb8)

[bjoernQ]

Apparently the bootloaders are compiled with the default setting which gives us this for chips which support configurable MMU page sizes:

While the bootloader still works fine I can see us answering questions about this - we should avoid that.

Long term we probably want to have some automated process to build all the bootloaders with the correct settings for us.

[SergioGasquez]

Just updated C2, C2_26MHz, C6 and H2 with

CONFIG_ESPTOOLPY_FLASHSIZE_64MB=y
# CONFIG_ESPTOOLPY_FLASHSIZE_128MB is not set
CONFIG_ESPTOOLPY_FLASHSIZE="64MB"

(for future reference, in menuconfig the option is called flash size)

Edit: Just updated the readme with this info

[bjoernQ]

Thanks