Minor: Renamed Gateway API Rate Limits to Router API Rate Limits.

Summary by gemma-4-12b. It may be wrong; the diff below is what actually changed. Raw: 96b7ed27e7-perplexity-rate-limits.diff · commit 96b7ed27e7

diff --git a/snapshots/perplexity/rate-limits.md b/snapshots/perplexity/rate-limits.mdindex ba3dc42..f12100f 100644--- a/snapshots/perplexity/rate-limits.md+++ b/snapshots/perplexity/rate-limits.md@@ -20,7 +20,7 @@ You can check your current usage tier on the Pricing page in the API Console. Tiers are based on cumulative purchases across your account lifetime, not current balance. -## Gateway API Rate Limits+## Router API Rate Limits -Gateway API requests are rate limited. When a request is rate limited, or an upstream model is overloaded, the API returns a `429` with a `Retry-After` header — retry after the indicated interval.+Router API requests are rate limited. When a request is rate limited, or an upstream model is overloaded, the API returns a `429` with a `Retry-After` header — retry after the indicated interval.  Requests rejected with a `429` are not billed.

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