Removing asterisks before and after true and bing spell check key

Removing asterisks that cause the query to break. Only the placeholder for keys are shown in this example query to replace for the user
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cc: @diberry
GitHub Issue: https://github.com/MicrosoftDocs/azure-docs/issues/51089

Author: RohitMungi-MSFT

articles/cognitive-services/LUIS/luis-tutorial-bing-spellcheck.md

@@ -66,7 +66,7 @@ The endpoint query needs the key passed in the query string parameters for each
 
 The endpoint URL has several values that need to be passed correctly. The Bing Spell Check API v7 key is just another one of these. You must set the **spellCheck** parameter to true and you must set the value of **bing-spell-check-subscription-key** to the key value:
 
-`https://{region}.api.cognitive.microsoft.com/luis/v2.0/apps/{appID}?subscription-key={luisKey}&spellCheck=**true**&bing-spell-check-subscription-key=**{bingKey}**&verbose=true&timezoneOffset=0&q={utterance}`
+`https://{region}.api.cognitive.microsoft.com/luis/v2.0/apps/{appID}?subscription-key={luisKey}&spellCheck=true&bing-spell-check-subscription-key={bingKey}&verbose=true&timezoneOffset=0&q={utterance}`
 
 ## Send misspelled utterance to LUIS
 1. In a web browser, copy the preceding string and replace the `region`, `appId`, `luisKey`, and `bingKey` with your own values. Make sure to use the endpoint region, if it is different from your publishing [region](luis-reference-regions.md).