Fix pay-per-use description in homepage (#6221)

Signed-off-by: Guzman <[email protected]>
Co-authored-by: Guzman <[email protected]>

Author: knative-prow-robot

overrides/home.html

@@ -50,7 +50,7 @@ <h1>Need to know more?</h1>
       <h1>Why serverless containers?</h1>
       <p class="normal-text-head">
         Serverless refers to running back-end programs and processes in the cloud. Serverless works on an as-used basis,
-        meaning that companies only use what they pay for. Knative is a platform-agnostic
+        meaning that companies only pay for what they use. Knative is a platform-agnostic
         solution for running serverless deployments.
       </p>
       <div class="img-table">