cli param --version not working without a config.yml file

[muhgatus]

I guess this is not intended :)

# ./json_exporter --version
json_exporter: error: path 'config.yml' does not exist, try --help
# touch config.yml
# ./json_exporter --version
json_exporter, version 0.6.0 (branch: HEAD, revision: 2f9b473b83faf29da4050d12e5d510059b7475bb)
  build user:       root@51ced0102bcd
  build date:       20230606-02:44:54
  go version:       go1.20.4
  platform:         linux/amd64
  tags:             netgo static_build

or

# ./json_exporter --version --config.file=/etc/null
json_exporter, version 0.6.0 (branch: HEAD, revision: 2f9b473b83faf29da4050d12e5d510059b7475bb)
  build user:       root@51ced0102bcd
  build date:       20230606-02:44:54
  go version:       go1.20.4
  platform:         linux/amd64
  tags:             netgo static_build