fix(doc): Correct typo in version check error message

Change 'none pkgbase' to 'non-pkgbase' as the sentence refers sections
that are not the pkgbase section, rather than an empty pkgbase section
or something of that sort that could be misconstrued by using the word
'none'.

Component: pkgctl version check

src/lib/version/check.sh

@@ -267,7 +267,7 @@ nvchecker_check_config() {
 
 	# check if the config contains any section other than pkgbase
 	if [[ -n ${pkgbase} ]] && property=$(grep --max-count=1 --perl-regexp "^\\[(?!\"?${pkgbase}\"?\\]).+\\]" < "${config}"); then
-		printf "none pkgbase section not supported in %s: %s" "${config}" "${property}"
+		printf "non-pkgbase section not supported in %s: %s" "${config}" "${property}"
 		return 1
 	fi
 }