add vector include to util.h , build was failing when building with conan with undefined template for std::vector<std::string>, using libc++14/clang14

Author: conradjones

src/util/util.h

@@ -2,6 +2,7 @@
 
 // system headers
 #include <string>
+#include <vector>
 
 namespace appimage::update::util {
     void removeNewlineCharacters(std::string& str);