update(simplecov docs): How to merge SimpleCov reports from parallel …

…CI nodes

docusaurus/docs/ruby/simplecov.md

@@ -39,8 +39,6 @@ end
 
 This is needed to avoid conflicts between code coverage reports generated by parallel CI nodes.
 
-If the local drive is common between parallel nodes on your CI, `simplecov` will generate a single report at `coverage/index.html` with merged data. Otherwise, you can refer to [How to merge CodeClimate reports for parallel jobs (CI nodes)](https://docs.knapsackpro.com/2019/how-to-merge-codeclimate-reports-for-parallel-jobs-ci-nodes) or [How to merge SimpleCov results with parallel Rails specs on Semaphore CI](https://docs.knapsackpro.com/2020/how-to-merge-simplecov-results-with-parallel-rails-specs).
-
 Please [see this if you use CodeClimate](code-climate.md#rspec).
 
 ## Minitest
@@ -86,3 +84,20 @@ Please [see this if you use CodeClimate](code-climate.md#minitest).
 
 </details>
 
+## How to merge SimpleCov reports from parallel CI nodes
+
+### Isolated parallel nodes with their own disk
+
+Please check SimpleCov docs for [merging test runs under different execution environments](https://github.com/simplecov-ruby/simplecov?tab=readme-ov-file#merging-test-runs-under-different-execution-environments).
+
+You could create [a rake task to merge SimpleCov reports](https://github.com/simplecov-ruby/simplecov/issues/986#issuecomment-1164999210).
+
+Please refer to your CI provider documentation to learn how to get files from parallel nodes and put them in the same location so that you can merge them.
+You can also look at these examples:
+
+* [How to merge SimpleCov results with parallel Rails specs on Semaphore CI](https://docs.knapsackpro.com/2020/how-to-merge-simplecov-results-with-parallel-rails-specs)
+* [How to merge CodeClimate reports for parallel jobs (CI nodes)](https://docs.knapsackpro.com/2019/how-to-merge-codeclimate-reports-for-parallel-jobs-ci-nodes)
+
+### Shared disk between parallel nodes
+
+SimpleCov generates a single report at `coverage/index.html` with merged data if a local drive is shared between parallel nodes. This is the case when you use Jenkins and the disk is shared between parallel nodes.