fix: correct formatting of status print

[garethgeorge]

Fixes framework's status print "Serving function: ..." on startup when no target is specified in local dev (allows serving multiple functions from a single instance of function framework). Today the output looks like:

Serving function: "declarativeHTTP"Serving function: "concurrentHTTP"Serving function: "declarativeCloudEvent"

With the fix:

Serving function: "declarativeHTTP"
Serving function: "concurrentHTTP"
Serving function: "declarativeCloudEvent"

[kenneth-rosario]

Nice!