Fix template

Author: mcanevet

9.5/templates/pghoard.json.tmpl

@@ -48,7 +48,7 @@
    },
    "http_address": "127.0.0.1",
    "http_port": 16000,
-   "log_level": "{{getenv "LOG_LEVEL"}},
+   "log_level": "{{getenv "LOG_LEVEL"}}",
    "syslog": false,
    "syslog_address": "/dev/log",
    "syslog_facility": "local2"