### What this PR does / why we need it?
Fix cann related urls in installation doc.
### Does this PR introduce _any_ user-facing change?
The users install cann manually could use the correct url after this pr
### How was this patch tested?
N/A
- vLLM version: v0.10.0
- vLLM main:
5bbaf492a6
Signed-off-by: MengqingCao <cmq0113@163.com>