netbox.env: fixed unwanted string interpolation

Author: toriningen

env/netbox.env

@@ -29,6 +29,6 @@ REDIS_INSECURE_SKIP_TLS_VERIFY=false
 REDIS_PASSWORD=H733Kdjndks81
 REDIS_SSL=false
 RELEASE_CHECK_URL=https://api.github.com/repos/netbox-community/netbox/releases
-SECRET_KEY=r(m)9nLGnz$(_q3N4z1k(EFsMCjjjzx08x9VhNVcfd%6RF#r!6DE@+V5Zk2X
+SECRET_KEY='r(m)9nLGnz$(_q3N4z1k(EFsMCjjjzx08x9VhNVcfd%6RF#r!6DE@+V5Zk2X'
 SKIP_SUPERUSER=true
 WEBHOOKS_ENABLED=true