ICM: Readme fixes.

Author: dmitry-ivanov

README.md

@@ -20,7 +20,7 @@ Prevents overlapping for Laravel console commands.
 - [Strategies](#strategies)
 - [Advanced](#advanced)
   - [Set custom timeout](#set-custom-timeout)
-  - [Mutex for several commands](#mutex-for-several-commands)
+  - [Handle several commands](#handle-several-commands)
 - [Troubleshooting](#troubleshooting)
   - [Trait included, but nothing happens?](#trait-included-but-nothing-happens)
   - [Several traits conflict?](#several-traits-conflict)
@@ -142,7 +142,7 @@ There are three possible options for `$mutexTimeout` field:
 - `{milliseconds}` - check, and wait for a maximum of milliseconds specified;
 - `null` - wait, till running instance finish its execution;
 
-### Mutex for several commands
+### Handle several commands
 
 Sometimes it is useful to set common mutex for a several commands. You can easily achieve this by setting them the same mutex name.
 By default, mutex name is generated based on a command's name and arguments. To change this, just override `getMutexName` method in your command: