Fix certbot venv dir in install

Makefile

@@ -33,6 +33,6 @@ install:
 	install --target-directory=$(DESTDIR)$(RPM_SYSCONFDIR)/netoik-rp/ conf/ovh.ini
 	install --directory $(DESTDIR)$(RPM_UNITDIR)
 	install --target-directory=$(DESTDIR)$(RPM_UNITDIR)/ services/netoik-rp.service
-	install --directory $(DESTDIR)/certbot
+	install --directory $(DESTDIR)/opt/certbot
 	install --directory $(DESTDIR)$(RPM_SBINDIR)
 	touch $(DESTDIR)$(RPM_SBINDIR)/certbot