Extra pipe in Multicluster task

The "Install Linkerd and Linkerd Viz" section contains a shell snippet with an extra `|`.

```
# first, install the Linkerd CRDs in both clusters
linkerd install --crds |
| tee \
```

Find the “Install Linkerd and Linkerd Viz” section in the website source and inspect the shell snippet shown in the issue. Remove the extra pipe in the command, then verify that the rendered documentation shows a valid snippet with the intended pipeline.

Written by the indexing model from the issue text.