Fix code span syntax in 004-bash-variables.md (#6)

Author: PeterDaveHello

content/004-bash-variables.md

@@ -58,7 +58,7 @@ Here is a rundown of the script:
 
 * `#!/bin/bash` - first, we specified our shebang
 * `name=DevDojo` - then we defined a variable called `name` and assigned a value to it
-* `echo "Hi there $name" - finally we output the content of the variable on the screen by using `echo`
+* `echo "Hi there $name"` - finally we output the content of the variable on the screen by using `echo`
 
 You can also add multiple variables: