[MacPorts] missing parameter in activation command

[BjarneDMat]

Summary

add the missing --set actionflag to the select action

Details

the activation command is incorrect. it should be : sudo port select --set php php85

Additional context

No response

[shivammathur]

@BjarneDMat

It defaults to --set when no parameter is specified
https://github.com/macports/macports-base/blob/master/src/port/port.tcl#L2298