.github/scripts/check_readme.sh: Fixed return status

- Returning 0 wouldn't signal the action flow to fail

Signed-off-by: Cristian Mihai Popa <cristianmihai.popa@analog.com>

Author: cristianmihaipopa

.github/scripts/check_readme.sh

@@ -170,5 +170,5 @@ done
 
 if [ "$fail" -eq 1 ]; then
     echo "Something occurred! Check the output of the script."
-    exit 0
+    exit 1
 fi