fix_step_cost (#1166)

components/Starknet/modules/architecture_and_concepts/pages/Network_Architecture/fee-mechanism.adoc

@@ -180,7 +180,7 @@ The weights are listed in the table xref:#gas_cost_per_cairo_step_or_builtin_ste
 |===
 | Step or builtin | Gas cost
 
-| Cairo step | 0.00025 gas/step
+| Cairo step | 0.0025 gas/step
 | Pedersen | 0.08 gas/application
 | Poseidon | 0.08 gas/application
 | Range check | 0.04 gas/application
@@ -304,4 +304,4 @@ The pricing of the above components in terms of L1 gas is given by the following
 | CASM bytecode | 28 gas/felt
 | Sierra bytecpde | 28 gas/felt
 | ABI | 0.875 gas/character
-|===
+|===