Fix typo in error message (#2274)

Author: CLHatch

main.sh

@@ -17,7 +17,7 @@ verlt() { ! verlte "${2}" "${1}"; }
 declare REQUIRED_BASH_VERSION="4"
 if verlt "${BASH_VERSION}" "${REQUIRED_BASH_VERSION}"; then
     echo "Unsupported bash version."
-    echo "${APPLICATION_NAME} requres at least bash version ${REQUIRED_BASH_VERSION}, installed version is ${BASH_VERSION}."
+    echo "${APPLICATION_NAME} requires at least bash version ${REQUIRED_BASH_VERSION}, installed version is ${BASH_VERSION}."
     exit 1
 fi