Update docs/src/calling-contracts/cost-estimation.md

Co-authored-by: Ahmed Sagdati <37515857+segfault-magnet@users.noreply.github.com>

docs/src/calling-contracts/cost-estimation.md

@@ -6,7 +6,7 @@ With the function `estimate_transaction_cost(tolerance: Option<f64>, block_horiz
 {{#include ../../../packages/fuels-accounts/src/provider.rs:transaction_cost}}
 ```
 
-> **Note** `script_gas` reefers to the part of the gas spent on the script execution.
+> **Note** `script_gas` refers to the part of the gas spent on the script execution.
 
 Below are examples that show how to get the estimated transaction cost from single and multi call transactions.