fix: Odometer block (fixes #92)

[Suhas-G]

Odometer block was throwing an error regarding data buffer size. Changed data type of output from '<U6' to '<U64'

[muhammadtahasuhail]

@Suhas-G I think you have a slightly older version of the blocks. The new ones can be found on this repository: https://github.com/JdeRobot/VisualCircuit-resources/tree/main/block-library
If there are any issues related to blocks, I think we should handle them on that repository.

[Suhas-G]

@AbsorbedInThought I took the original VC file from that repository itself. It has the same issue.
I will anyway have to put these files here, because these are imported in VisualCircuit3. Once backend is ready we can move them to a separate repo and use a request to fetch the file from backend.