{doc} Fix NanoVDB README links

[asmaloney]

Files moved in fb95b366343603d8824fe477541d07342dba9901.

Also removes link to non-existent file (Grid cells vs grid nodes PDF).

Signed-off-by: Andy Maloney [email protected]

[linux-foundation-easycla[bot]]

• :x: - login: @asmaloney / name: Andy Maloney . The commit (435d1035ef33f0b39d26805816542e9301bec2a0) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[kmuseth]

Hi Andy, thanks for fixing this! However, it looks like you either forgot to "--signoff" during the commit or sign a CLA (or both). I can offer to add your changes in a separate PR.

[kmuseth]

Since the CLA was not signed this PR is closed and replaced by #1488