Fix typo in README.md (#109)

### Motivation and Context

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### Description
bocked -> blocked
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### Contribution Checklist

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- [x] The code builds clean without any errors or warnings
- [x] The PR follows the [Contribution
Guidelines](https://github.com/microsoft/copilot-chat/blob/main/CONTRIBUTING.md)
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raises no violations
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README.md

@@ -65,7 +65,7 @@ You will need the following items to run the sample:
     .\Start.ps1 
     ```
 
-    > **IMPORTANT:** Confirm pop-ups are not bocked and you are logged in with the same account used to register the application.
+    > **IMPORTANT:** Confirm pop-ups are not blocked and you are logged in with the same account used to register the application.
     
     > **NOTE:** It may take a few minutes for Yarn packages to install on the first run.
 
@@ -117,7 +117,7 @@ You will need the following items to run the sample:
     ./Start.sh
     ```
 
-    > **IMPORTANT:** Confirm pop-ups are not bocked and you are logged in with the same account used to register the application.
+    > **IMPORTANT:** Confirm pop-ups are not blocked and you are logged in with the same account used to register the application.
 
     > **NOTE:** It may take a few minutes for Yarn packages to install on the first run.