Update docs/user-guide.md

Co-authored-by: kayamin <[email protected]>

docs/user-guide.md

@@ -29,7 +29,7 @@ The `base_manifest.yaml` describes the common values for each load test in the K
 
 Fields marked `<config.yaml overrides this field>` in `base_manifest.yaml` are set to different values for each load test. The value of this field will be replaced by the value in `config.yaml` respectively when Gatling Commander runs. Therefore, setting values to fields marked `<config.yaml overrides this field>` in `base_manifest.yaml` is not necessary.
 
-\* Gatling Commander once loads `base_manifest.yaml` value to Gatling struct object before it replaces the value by `config.yaml`. So the type of `base_manifest.yaml` field value must be matched to Gatling struct field one. If type not match, an error like following error will be occured.
+\* Gatling Commander once loads `base_manifest.yaml` value to Gatling struct object before it replaces the value by `config.yaml`. So the type of `base_manifest.yaml` field value must be matched to Gatling struct field one. If type not match, an error like following occur.
 
 ```go
 json: cannot unmarshal string into Go struct field TestScenarioSpec.spec.testScenarioSpec.parallelism of type int32