Fix documentation that describes where to configure notifications
Fix documentation that describes where to configure notifications

In the Web UI this setting is found under 'Notifications' now, earlier
this was called 'Watched Projects'.

Signed-off-by: Edwin Kempin <d43fb6c98c97e553b671ed9a9318100f1de386e7@google.com>
Release-Notes: skip
Change-Id: I1c97c5aa42f15c9a35d1516c778e4e469e1b2e92

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