Update docs/pricing/index.mdx

Co-authored-by: Alex Krawiec <[email protected]>

Author: dashed

docs/pricing/index.mdx

@@ -81,7 +81,7 @@ All Sentry plans include **one cron monitor**. To activate additional monitors,
 **Key Points:**
 
 - **Deactivating or Deleting Monitors**:
-  - Deactivated or deleted monitors will **count** towards your billing quota if they were previously active in the current billing period. Otherwise, they don't count towards your billing quota.
+  - Deactivated or deleted monitors will **count** towards your billing quota if they were previously active in the current billing period. Otherwise, they won't count towards your billing quota.
   - Their quota becomes **reusable** within the **same billing period**.
 - **Activating Monitors**:
   - Sentry first uses any **reusable quota** from monitors deactivated or deleted in the current billing period.