docs(reference/nix-daemon): fix some links

[se-StorePathName] was missing in the footnotes, and links to sets were
wrong.

Also rename serialization.md to types.md to match the title.

Change-Id: I8e602df1958cf5354c6fd3a5c16cbe859a0549b9
Reviewed-on: https://cl.snix.dev/c/snix/+/30275
Autosubmit: Florian Klink <flokli@flokli.de>
Tested-by: besadii
Reviewed-by: Brian Olsen <brian@maven-group.org>

web/content/docs/reference/nix-daemon-protocol/handshake.md

@@ -45,5 +45,5 @@ parameters.
 - send logs
 - [operation]({{< relref "operations.md" >}}) :: [Int](#se-Int)
 
-[se-Int]: {{< relref "serialization.md" >}}#int
-[se-Bool]: {{< relref "serialization.md" >}}#bool
+[se-Int]: {{< relref "types.md" >}}#int
+[se-Bool]: {{< relref "types.md" >}}#bool