Update llarp/router/router.cpp

use `fmt::join` for lokinet version string in status

Co-authored-by: Jason Rhinelander <jason@imaginary.ca>

llarp/router/router.cpp

@@ -879,7 +879,7 @@ namespace llarp
   {
     std::string status;
     auto out = std::back_inserter(status);
-    fmt::format_to(out, "v{}", llarp::VERSION_STR);
+    fmt::format_to(out, "v{}", fmt::join(llarp::VERSION, "."));
     if (IsServiceNode())
     {
       fmt::format_to(