📝 update README.md

Author: techouse

README.md

@@ -85,7 +85,7 @@ Options:
   --help                          Show this message and exit.
 ```
 
-#### Docker image usage
+#### Docker
 
 If you don't want to install the tool on your system, you can use the Docker image instead.
 
@@ -115,4 +115,4 @@ If you're on macOS, you can install the tool using [Homebrew](https://brew.sh/).
 brew tap techouse/mysql-to-sqlite3
 brew install mysql-to-sqlite3
 mysql2sqlite --help
-```
+```