Updated workshop signup cancellation email subject.
Updated workshop signup cancellation email subject.

rvarshney/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,ty-po/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org