server: Fix typo in Makefile (#28710)

server/Makefile

@@ -457,7 +457,7 @@ test-server: export GOTESTSUM_FORMAT := $(GOTESTSUM_FORMAT)
 test-server: export GOTESTSUM_JUNITFILE := $(GOTESTSUM_JUNITFILE)
 test-server: export GOTESTSUM_JSONFILE := $(GOTESTSUM_JSONFILE)
 test-server: test-server-pre
-	$(GOBIN)/gotestsum --rerun-fails=3 --packages="$(TE_PACKAGES) $(EE_PACKAGES)" -- $(GOFLAGS)-timeout=90m
+	$(GOBIN)/gotestsum --rerun-fails=3 --packages="$(TE_PACKAGES) $(EE_PACKAGES)" -- $(GOFLAGS) -timeout=90m
 ifneq ($(IS_CI),true)
   ifneq ($(MM_NO_DOCKER),true)
     ifneq ($(TEMP_DOCKER_SERVICES),)