script: Don't force release tag
script: Don't force release tag

If the tag already exists, we end up overwriting the previous
release and the tag doesn't end up being written to GitHub.

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

rikur/flynn,benbjohnson/flynn,flynn/flynn,schatt/flynn,arekkas/flynn,clifff/flynn,philiplb/flynn,rikur/flynn,supermario/flynn,whouses/flynn,shads196770/flynn,supermario/flynn,pkdevbox/flynn,tonicbupt/flynn,technosophos/flynn,benbjohnson/flynn,GrimDerp/flynn,TribeMedia/flynn,jzila/flynn,lmars/flynn,josephglanville/flynn,philiplb/flynn,whouses/flynn,rikur/flynn,justintung/flynn,ozum/flynn,kgrz/flynn,pkdevbox/flynn,tonicbupt/flynn,lmars/flynn,flynn/flynn,kgrz/flynn,jzila/flynn,shads196770/flynn,ozum/flynn,shads196770/flynn,clifff/flynn,felixrieseberg/flynn,philiplb/flynn,supermario/flynn,pkdevbox/flynn,flynn/flynn,shads196770/flynn,kgrz/flynn,whouses/flynn,technosophos/flynn,justintung/flynn,TribeMedia/flynn,GrimDerp/flynn,flynn/flynn,philiplb/flynn,jzila/flynn,justintung/flynn,ozum/flynn,lmars/flynn,arekkas/flynn,TribeMedia/flynn,benbjohnson/flynn,schatt/flynn,schatt/flynn,TribeMedia/flynn,jzila/flynn,josephglanville/flynn,pkdevbox/flynn,Brandywine2161/flynn,clifff/flynn,jzila/flynn,arekkas/flynn,kgrz/flynn,felixrieseberg/flynn,clifff/flynn,ozum/flynn,schatt/flynn,justintung/flynn,schatt/flynn,shads196770/flynn,felixrieseberg/flynn,GrimDerp/flynn,whouses/flynn,GrimDerp/flynn,benbjohnson/flynn,lmars/flynn,josephglanville/flynn,shads196770/flynn,josephglanville/flynn,benbjohnson/flynn,ozum/flynn,justintung/flynn,josephglanville/flynn,GrimDerp/flynn,pkdevbox/flynn,GrimDerp/flynn,Brandywine2161/flynn,pkdevbox/flynn,flynn/flynn,technosophos/flynn,TribeMedia/flynn,tonicbupt/flynn,supermario/flynn,justintung/flynn,Brandywine2161/flynn,josephglanville/flynn,benbjohnson/flynn,lmars/flynn,ozum/flynn,felixrieseberg/flynn,clifff/flynn,tonicbupt/flynn,rikur/flynn,Brandywine2161/flynn,whouses/flynn,arekkas/flynn,rikur/flynn,kgrz/flynn,whouses/flynn,supermario/flynn,tonicbupt/flynn,technosophos/flynn,arekkas/flynn,Brandywine2161/flynn,supermario/flynn,schatt/flynn,philiplb/flynn,kgrz/flynn,jzila/flynn,Brandywine2161/flynn,rikur/flynn,technosophos/flynn,TribeMedia/flynn,clifff/flynn,felixrieseberg/flynn