Spin up --help on multi trigger not clear

[karthik2804]

When running the spin up --help in a multi-trigger app, the output prints the help options of both but there is no way to identify which set of options belong to which trigger.

actual:

$ spin up --help                 
spin-up 
Start the Spin application

USAGE:
    spin up [OPTIONS]

OPTIONS:
        ...
TRIGGER OPTIONS:
        ...
TRIGGER OPTIONS:
        ...

expected:

$ spin up --help                 
spin-up 
Start the Spin application

USAGE:
    spin up [OPTIONS]

OPTIONS:
        ...
HTTP TRIGGER OPTIONS:
        ...
REDIS TRIGGER OPTIONS:
        ...