fix: escape dash in IP regex properly

.githooks/pre-commit

@@ -103,7 +103,7 @@ echo "SUCCESS: URL detection stage."
 
 ### IP address detection stage
 # This is pretty basic regex matching, but it's a start.
-IP_REGEX='[^:alpha:\-/][0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'
+IP_REGEX='[^a-zA-ZäöÜÄÖÜß/\\\-][0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'
 ${GREP_CMD} ${GREP_EXCLUDES} -e "${IP_REGEX}" "${REPOPATH}" | grep -v "127.0.0"
 if [[ ${?} -eq 0 ]]; then
 	echo "ERROR: found IP address."