slight updates

Author: sloanster

articles/communication-services/how-tos/calling-sdk/includes/install-sdk/install-sdk-web.md

@@ -7,7 +7,7 @@ ms.author: micahvivion
 ---
 ## Install the SDK
 
-Use the `npm install` command to install the Azure Communication Services Common and Calling SDKs for JavaScript:
+Use the `npm install` command to install the Azure Communication Services Common and Calling SDK for JavaScript:
 
 ```console
 npm install @azure/communication-common --save
@@ -51,7 +51,7 @@ The `Call Agent` instance helps you manage calls (to join or start calls). In or
 **Connected** - A `Call Agent` connectionStatue value of `Connected` means the client SDK is connected and capable of receiving notifications from Microsoft infrastructure.
 
 **Disconnected** - A `Call Agent` connectionStatue value of `Disconnected` states there's an issue that is preventing the SDK it from properly connecting. `Call Agent` should be re-created.
-- `invalidToken`: If a token expired or it's invalid `Call Agent` instance disconnects with this error.
+- `invalidToken`: If a token is expired or is invalid `Call Agent` instance disconnects with this error.
 - `connectionIssue`:  If there's an issue with the client connecting to Microsoft infrascture, after many retries `Call Agent` exposes the `connectionIssue` error.
 
 You can check if your local `Call Agent` is connected to Microsoft infrastructure by inspecting the current value of `connectionState` property. During an active call you can listen to the `connectionStateChanged` event to determine if `Call Agent` changes from **Connected** to **Disconnected** state.