Minor deployment template fix. [skip ci]

ops/helm/nomad/templates/api-deployment.yaml

@@ -64,7 +64,7 @@ metadata:
 data:
   gunicorn.conf: |
     secure_scheme_headers = {'X-FORWARDED-PROTOCOL': 'ssl', 'X-FORWARDED-PROTO': 'https', 'X-FORWARDED-SSL': 'on'}
-    worker_class = {{ .Values.api.workerClass }} 
+    worker_class = '{{ .Values.api.workerClass }}'
     threads = {{ .Values.api.threads }}
     worker_connections = 1000
     worker = {{ .Values.api.worker }}