Fix insecure_disable_tls_host_verification in serve more

It's currently using `--insecure_tls_verify_host` which is inconsistent with
fetch-mode and not what the help text says.

src/main.zig

@@ -333,7 +333,7 @@ fn parseServeArgs(
             continue;
         }
 
-        if (std.mem.eql(u8, "--insecure_tls_verify_host", opt)) {
+        if (std.mem.eql(u8, "--insecure_disable_tls_host_verification", opt)) {
             tls_verify_host = false;
             continue;
         }