fix: initialize hook field in LogEntryContent constructor to fix clang-tidy warning

cppcoreguidelines-pro-type-member-init: constructor does not initialize field 'hook' in taxi/uservices/userver/universal/src/logging/dynamic_debug.hpp. Add explicit default initialization of LogEntryContentHook hook{} in the member initializer list.

This fixes errors introduced in rXXXXXX.
commit_hash:08b7abca0fd3dba3f1e28cb43743e8b4461d2df9

Author: georgthegreat

universal/src/logging/dynamic_debug.hpp

@@ -28,7 +28,7 @@ static_assert(std::atomic<EntryState>::is_always_lock_free);
 using LogEntryContentHook = bi::set_base_hook<bi::optimize_size<true>, bi::link_mode<bi::normal_link>>;
 
 struct LogEntryContent {
-    LogEntryContent(const char* path, int line) noexcept : line(line), path(path) {}
+    LogEntryContent(const char* path, int line) noexcept : line(line), path(path), hook{} {}
 
     std::atomic<EntryState> state{EntryState{}};
     const int line;