Cleaned up CSV2YAML skill database label (#4585)

* Strips the "_Skill" from TargetType.
* Cleaned up documentation header to match.

src/tool/csv2yaml.cpp

@@ -1461,6 +1461,7 @@ static bool skill_parse_row_skilldb(char* split[], int columns, int current) {
 	if (atoi(split[3]) != 0) {
 		constant = constant_lookup(atoi(split[3]), "INF_");
 		constant.erase(0, 4);
+		constant.erase(constant.size() - 6);
 		body << YAML::Key << "TargetType" << YAML::Value << name2Upper(constant);
 	}