[docs][index.md] broken link refers to non-existing file periphALtypes.h
There is a broken link in docs/index.md#periphAL-(periphery-abstraction-layer) which refers to the file periphALtypes.h
which seems to not exist anymore.
There is a broken link in docs/index.md#periphAL-(periphery-abstraction-layer) which refers to the file periphALtypes.h
which seems to not exist anymore.