Fix minor mistakes in the root README (#8242)

Author: dlarocque

README.md

@@ -18,8 +18,11 @@ To get started using Firebase, see
 [![Release Notes](https://img.shields.io/npm/v/firebase.svg?style=flat-square&label=Release%20Notes%20for&labelColor=039be5&color=666)](https://firebase.google.com/support/release-notes/js)
 
 ## Upgrade to Version 9
+
 Version 9 has a redesigned API that supports tree-shaking. Read the [Upgrade Guide](https://firebase.google.com/docs/web/modular-upgrade) to learn more.
+
 ## Supported Environments
+
 Please see [Environment Support](https://firebase.google.com/support/guides/environments_js-sdk).
 
 ## SDK Dev Workflow
@@ -30,7 +33,7 @@ Please see [Environment Support](https://firebase.google.com/support/guides/envi
 
 Before you can start working on the Firebase JS SDK, you need to have Node.js
 installed on your machine. As of April 19th, 2024 the team has been testing with Node.js version 
-`20.12.2`, but the required verison of Node.js may change as we update our dependencies.
+`20.12.2`, but the required version of Node.js may change as we update our dependencies.
 
 To download Node.js visit https://nodejs.org/en/download/.
 
@@ -44,7 +47,7 @@ In addition to Node.js we use `yarn` to facilitate multi package development.
 To install `yarn` follow the instructions listed on their website:
 https://yarnpkg.com/en/docs/install
 
-This repo currently supports building with yarn `1.x`. For instance, after installating yarn, run
+This repo currently supports building with yarn `1.x`. For instance, after installing yarn, run
 ```bash
 $ yarn set version 1.22.11
 ```
@@ -204,7 +207,7 @@ In order to manually test your SDK changes locally, you must use [yarn link](htt
 ```shell
 $ cd packages/firebase
 $ yarn link # initialize the linking to the other folder
-$ cd ../packages/<my-product> # Example: $ cd packages/database
+$ cd ../<my-product> # Example: $ cd ../firestore
 $ yarn link # link your product to make it available elsewhere
 $ cd <my-test-app-dir> # cd into your personal project directory
 $ yarn link firebase @firebase/<my-product> # tell yarn to use the locally built firebase SDK instead