Update yarn install step from dev guide (#5067) (#5184)

* Update yarn install step from dev guide
* Update the corepack command
* Update to use corepack install
* Revise corepack url

---------

Signed-off-by: Matt Provost <provomat@amazon.com>
(cherry picked from commit 46d7c2d)

Co-authored-by: Matt Provost <provomat@amazon.com>

DEVELOPER_GUIDE.md

@@ -63,11 +63,17 @@ If it's the only version of node installed, it will automatically be set to the
 
 #### Install `yarn`
 
+OpenSearch Dashboards is set up using yarn, which can be installed through corepack. To install yarn, run:
+
 ```bash
+$ # Update corepack to the latest version
 $ npm i -g corepack
+
+$ # Install the correct version of yarn
+$ corepack install
 ```
 
-(See the [Yarn installation documentation](https://yarnpkg.com/getting-started/install) for more information.)
+(See the [corepack documentation](https://github.com/nodejs/corepack#-corepack) for more information.)
 
 ### Fork and clone OpenSearch Dashboards
 

package.json

@@ -23,6 +23,7 @@
   "bugs": {
     "url": "http://github.com/opensearch-project/OpenSearch-Dashboards/issues"
   },
+  "packageManager": "yarn@1.22.19",
   "opensearchDashboards": {
     "clean": {
       "extraPatterns": [