Update ci-fix.md: link to LintDiff rules.md + make the ruleset more d…

…iscoverable (Azure#23509)

documentation/ci-fix.md

@@ -69,9 +69,13 @@ Please see [readme](https://github.com/Azure/openapi-diff/blob/main/README.md) f
 Or you can run it in [OpenAPI Hub](https://portal.azure-devex-tools.com/tools/diff).
 Refer to [Oad Docs](https://github.com/Azure/openapi-diff/tree/main/docs) for detailed description of all oad rules.
 
-## Linter Diff Validation
+## LintDiff Validation
+
+The [LintDiff validation tool](https://github.com/Azure/azure-openapi-validator) runs linting rules against specification difference. Two specifications are compared: the specification as it would be when proposed PR is merged, vs the specification as seen before the PR is merged.
+
+Refer to [openapi-authoring-automated-guidelines](https://github.com/Azure/azure-rest-api-specs/blob/master/documentation/openapi-authoring-automated-guidelines.md) for detailed description of all lint rules and how-to-fix guidance.  
+If that guidance is not enough, please also refer to the [LintDiff rules.md doc](https://github.com/Azure/azure-openapi-validator/blob/main/docs/rules.md). It links to `.md` files related to given error, containing instructions how to fix them.
 
-The lint diff validation is to run linter against the currect spec and the spec before current PR , the final result is the differece set between the result running against current specs and the result running against the specs before current PR.
 ### Run linter locally:
 
 #### Prerequisites:
@@ -88,7 +92,6 @@ autorest --v3 --spectral --validation --azure-validator --use=@microsoft.azure/o
 
 Please see [readme](https://github.com/Azure/azure-openapi-validator/blob/main/README.md) for how to install or run tool in details.
 Or you can run it in [OpenAPI Hub](https://portal.azure-devex-tools.com/tools/linter).
-Refer to [openapi-authoring-automated-guidelines](https://github.com/Azure/azure-rest-api-specs/blob/main/documentation/openapi-authoring-automated-guidelines.md) for detailed description of all lint rules and how-to-fix guidance.
 
 ## Avocado