Fix helm chart to generate config.postgresURI

The configuration was merged with the comment line above due to usage of
the {{- ...  -}} construct.

contrib/helm/clair/templates/configmap.yaml

@@ -14,7 +14,7 @@ data:
           # PostgreSQL Connection string
           # https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
           # This should be done using secrets or Vault, but for now this will also work
-          {{- if .Values.config.postgresURI -}}
+          {{- if .Values.config.postgresURI }}
           source: "{{ .Values.config.postgresURI }}"
           {{ else }}
           source: "postgres://{{ .Values.postgresql.postgresUser }}:{{ .Values.postgresql.postgresPassword }}@{{ template "postgresql.fullname" . }}:5432/{{ .Values.postgresql.postgresDatabase }}?sslmode=disable"