Renames AddOracleEvent -> RemoveOracleEvent (CryptozombiesHQ#547)

fa/16/05.md

@@ -121,6 +121,6 @@ We've gone ahead and created a function named `removeOracle`, and filled in the
 3. Inside the `removeOracle` function, add the `require` statement that checks that `numOracles > 1`. Set the message to `"Do not remove the last oracle!"`
 4. Call the `oracle.remove` function, passing it `_oracle` as an argument.
 5. Use `--` to decrement `numOracles`.
-6. Lastly, let's fire `AddOracleEvent`. It takes one argument- `_oracle`.
+6. Lastly, let's fire `RemoveOracleEvent`. It takes one argument- `_oracle`.
 
 This was a lot. And still, there's one thing left. The `addOracle` function should increment the `numOracles` variable. Don't worry about this though, we've gone ahead and added that line of code🤓.