[Inference API] update docs to reflect new daily rate limits (huggingface#1439)

* update docs for inference API rate limits

* Update docs/api-inference/rate-limits.md

Co-authored-by: Lucain <[email protected]>

* add a line about logging in

* thousands separator

* Update docs/api-inference/rate-limits.md

Co-authored-by: Julien Chaumond <[email protected]>

---------

Co-authored-by: Lucain <[email protected]>
Co-authored-by: Julien Chaumond <[email protected]>

Author: 3 people

docs/api-inference/rate-limits.md

@@ -4,8 +4,10 @@ The Inference API has rate limits based on the number of requests. These rate li
 
 Serverless API is not meant to be used for heavy production applications. If you need higher rate limits, consider [Inference Endpoints](https://huggingface.co/docs/inference-endpoints) to have dedicated resources.
 
+You need to be authenticated (passing a token or through your browser) to use the Inference API.
+
+
 | User Tier           | Rate Limit                |
 |---------------------|---------------------------|
-| Unregistered Users  | 1 request per hour        |
-| Signed-up Users     | 50 requests per hour     |
-| PRO and Enterprise Users           | 500 requests per hour    |
+| Signed-up Users     | 1,000 requests per day     |
+| PRO and Enterprise Users           | 20,000 requests per day    |