fix: correct typos in imghost chart

imghost/templates/deployment-oauth.yaml

@@ -55,7 +55,7 @@ spec:
                   name: "{{ include "imghost-helm.fullname" . }}-oauth2"
                   key: "cookie-secret"
           args:
-          - "--config=${local.proxy_config_path}"
+          - "--config=/proxy_config.yaml"
           - "--listen=0.0.0.0:4180"
           - "--enable-refresh-tokens=true"
           - "--discovery-url={{ .Values.oauth2.discoveryUrl }}"