update copy

Author: Jephuff

studio-docs/source/explorer/connecting-authenticating.mdx

@@ -178,7 +178,7 @@ Function that prompts the user for input and returns the value in a promise. If
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-The body of the `POST` request that will be sent to the configured graphql endpoint in the current request.
+The body of the `POST` request that's sent to the configured GraphQL endpoint for the current operation.
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