newsletter: Add WPT statistics to the December newsletter

src/content/newsletters/2024-12-31.mdx

@@ -20,7 +20,9 @@ In addition to these new sponsors, Ladybird has been chosen as one of ten benefi
 
 ### Web Platform Tests (WPT)
 
-This month, number go up!
+This month we've continued to make significant improvements WPT compliance - **123,181** more passing subtests than last month. This brings our total to **1,739,336**.
+
+A large part of this increase comes from the WPT suite now including more tests of WebAssembly core semantics, the majority of which we now pass.
 
 ### Replacing home-grown crypto with OpenSSL