fix typo

Co-authored-by: George Robinson <george.robinson@grafana.com>
Signed-off-by: Christoph Maser <christoph.maser+github@gmail.com>

config/config.go

@@ -361,7 +361,7 @@ func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	}
 
 	if c.Global.RocketchatTokenID != nil && len(c.Global.RocketchatTokenIDFile) > 0 {
-		return fmt.Errorf("at most one of rockethat_token_id & rockethat_token_id_file must be configured")
+		return fmt.Errorf("at most one of rocketchat_token_id & rocketchat_token_id_file must be configured")
 	}
 
 	names := map[string]struct{}{}