FIX tests net/synapse

Diff below fixes tests.
https://github.com/openbsd/ports/commit/90b405ebad2217bad9b88150eb6f0b50e871860b
renamed `trial-3` to `trial`.

OK?

diff --git Makefile Makefile
index 7ee0dbdad11..f7ebe669688 100644
--- Makefile
+++ Makefile
@@ -66,6 +66,6 @@ TEST_DEPENDS = ${RUN_DEPENDS} \
www/py-jwt${MODPY_FLAVOR}

do-test:
- cd ${WRKSRC} && ${SETENV} PYTHONPATH=. ${LOCALBASE}/bin/trial-3 tests
+ cd ${WRKSRC} && ${SETENV} PYTHONPATH=. ${LOCALBASE}/bin/trial tests

.include <bsd.port.mk>