Fix version in Getting Started documentation

Fixes microsoft/react-native-windows#15081.

Running the first command in React Native Windows' Getting Started
documentation fails with

> error Cannot read properties of null (reading 'major').

Dropping the quotes fixes this issue.  react-native-community/cli
docs also refer to these versions without quoting them.

Author: sundaramramaswamy

docs/getting-started.md

@@ -15,16 +15,16 @@ For information around how to set up React Native, see the [React Native Getting
 
 Call the following from the place where you want your project directory to live:
 
-<!-- Note, make sure both `@react-native-community/cli@ABC` and `--version "XYZ"` are pointing to the correct NPM tags in the command below. -->
+<!-- Note, make sure both `@react-native-community/cli@ABC` and `--version XYZ` are pointing to the correct NPM tags in the command below. -->
 
-<!-- 1. For the next version (i.e. in docs/getting-started.md) use "next" for the CLI and "nightly" for the RN version -->
-<!-- 2. For stable versions in versioned_docs use "latest" for the CLI and the semantic version, i.e. "^0.73.0" for the RN version -->
+<!-- 1. For the next version (i.e. in docs/getting-started.md) use `next` for the CLI and `nightly` for the RN version -->
+<!-- 2. For stable versions in versioned_docs use `latest` for the CLI and the semantic version, i.e. `^0.73.0` for the RN version -->
 
 <!-- See https://www.npmjs.com/package/@react-native-community/cli?activeTab=versions for the CLI version tags. -->
 <!-- See https://www.npmjs.com/package/react-native?activeTab=versions for the RN version tags. -->
 
 ```bat
-npx --yes @react-native-community/cli@next init <projectName> --version "nightly"
+npx --yes @react-native-community/cli@next init <projectName> --version nightly
 ```
 
 ### Navigate into this newly created directory
@@ -37,10 +37,10 @@ cd <projectName>
 
 ### Add React Native Windows to your project's dependencies
 
-<!-- Note, make sure "version" is pointing to the correct react-native-windows NPM tag in the command below. -->
+<!-- Note, make sure `version` is pointing to the correct react-native-windows NPM tag in the command below. -->
 
-<!-- 1. For the next version (i.e. in docs/getting-started.md) use "canary" -->
-<!-- 2. For other versions in versioned_docs use the version in the format "^0.XY.0" -->
+<!-- 1. For the next version (i.e. in docs/getting-started.md) use `canary` -->
+<!-- 2. For other versions in versioned_docs use the version in the format `^0.XY.0` -->
 
 Next you'll want to add `react-native-windows` as a dependency: