Capitalize title

Author: sketsdever

docs/flashbots-protect/quick-start.mdx

@@ -34,7 +34,7 @@ If you submit a transaction through Flashbots Protect via the MetaMask wallet, d
 
 :::
 
-### 0 priority fee transactions
+### 0 Priority Fees
 
 Flashbots Protect does not accept transactions with a priority fee of 0. They will be dropped and a standard error message will be returned.