Update azure-openai-token-limit-policy.md

fix example

Author: dlepow

articles/api-management/azure-openai-token-limit-policy.md

@@ -83,7 +83,7 @@ In the following example, the token limit of 5000 per minute is keyed by the cal
         <base />
         <azure-openai-token-limit
             counter-key="@(context.Request.IpAddress)"
-            tokens-per-minute="5000" estimate-prompt-tokens="false" "remaining-tokens-variable-name="remainingTokens" />
+            tokens-per-minute="5000" estimate-prompt-tokens="false" remaining-tokens-variable-name="remainingTokens" />
     </inbound>
     <outbound>
         <base />