Fixes spelling of Elasticsearch.

This change corrects the spelling of Elasticsearch.
Fixes humanmade/product-dev#1644

other-docs/guides/upgrading/v3.md

@@ -60,7 +60,7 @@ The `config.local.yaml` file generated by Local Chassis is now fully managed by
 when running `composer chassis provision`.
 [Modifications to `config.local.yaml` can now be defined in your `composer.json` config](docs://local-chassis).
 
-The version of ElasticSearch in use by Local Chassis has been changed from 5.6 to 6.3 to match the production environment. In most
+The version of Elasticsearch in use by Local Chassis has been changed from 5.6 to 6.3 to match the production environment. In most
 cases this should not present any problems and may only require you to reindex by
 running `composer chassis exec -- wp elasticpress index --setup --network-wide --url=<project>.local` if you do encounter any
 problems.
@@ -83,7 +83,7 @@ Writing and running PHPUnit tests for your application is now a simple process.
 in your project root directory and run `composer dev-tools phpunit`.
 
 Tests are run in your local environment, and provide full integration testing capabilities to match production, including S3,
-ElasticSearch, caching and Tachyon.
+Elasticsearch, caching and Tachyon.
 
 This feature provides flexibility for more complex use cases, check out
 the [unit testing documentation and examples here](docs://dev-tools/testing-with-phpunit.md).