Merge pull request #202 from princesinha19/fix

µs instead of us for a microsecond

Author: axic

determining_wasm_gas_costs.md

@@ -14,7 +14,7 @@ Ethereum nodes. We assume that a 2.2 Ghz model is the average.
 According to Intel, the 2.2 Ghz clock rate roughly equals to `2 200 000 000` cycles per second.
 
 **Assumption 2**: 1 second of CPU execution equals to 10 million gas
-(i.e. 1 gas equals to 0.1 us).
+(i.e. 1 gas equals to 0.1 µs).
 
 This equals to **`0.0045` gas per cycle**. (`10 000 000 / 2 200 000 000`)