semaphore: manually pin v3.2.9 for release upgrade tests

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

.semaphore.sh

@@ -2,7 +2,7 @@
 
 TEST_SUFFIX=$(date +%s | base64 | head -c 15)
 
-TEST_OPTS="RELEASE_TEST=y INTEGRATION=y PASSES='build unit release integration_e2e functional'"
+TEST_OPTS="RELEASE_TEST=y INTEGRATION=y PASSES='build unit release integration_e2e functional' MANUAL_VER=v3.2.9"
 if [ "$TEST_ARCH" == "386" ]; then
 	TEST_OPTS="GOARCH=386 PASSES='build unit integration_e2e'"
 fi