Fixes inconsistent version prefix in log messages.

Fixes #15381.

src/or/main.c

@@ -2800,7 +2800,7 @@ tor_init(int argc, char *argv[])
   {
     const char *version = get_version();
 
-    log_notice(LD_GENERAL, "Tor v%s running on %s with Libevent %s, "
+    log_notice(LD_GENERAL, "Tor %s running on %s with Libevent %s, "
                "OpenSSL %s and Zlib %s.", version,
                get_uname(),
                tor_libevent_get_version_str(),