update docs

Author: icecrasher321

apps/docs/content/docs/en/execution/costs.mdx

@@ -127,7 +127,7 @@ Use your own API keys for AI model providers instead of Sim Studio's hosted keys
   BYOK keys are encrypted at rest. Only workspace admins can manage keys.
 </Callout>
 
-When configured, workflows use your key instead of Sim Studio's hosted keys. If removed, workflows automatically fall back to hosted keys with the 1.4x multiplier.
+When configured, workflows use your key instead of Sim Studio's hosted keys. If removed, workflows automatically fall back to hosted keys with the multiplier.
 
 ## Cost Optimization Strategies