Minor textual update

geostat.cpp

@@ -629,7 +629,7 @@ int main(int argc, char** argv) {
 		y_min = std::min_element(cc.begin(), cc.end(), [&](const Cache& a, const Cache& b) { return a.date_hidden_tm.tm_year < b.date_hidden_tm.tm_year; })->date_hidden_tm.tm_year;
 		y_max = std::max_element(cc.begin(), cc.end(), [&](const Cache& a, const Cache& b) { return a.date_hidden_tm.tm_year < b.date_hidden_tm.tm_year; })->date_hidden_tm.tm_year;
 
-		std::cout << "<h2>Caches by hidden day matrix</h2>\n";
+		std::cout << "<h2>Caches by hidden month matrix</h2>\n";
 		std::cout << "<table class=\"dt\">\n";
 		std::cout << "<tr><th></th>";
 		for (int j = 1; j <= 12; j++) { // print table month headers