Complete grep script-04: exclude hello lines

Author: SlimMicheals

individual-shell-tools/grep/script-04.sh

@@ -3,4 +3,5 @@
 set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
+grep -vi "hello" dialogue.txt
 # The output should contain 10 lines.