fix incorrect filter logic (#1360)

cmd/crates/soroban-spec-typescript/src/lib.rs

@@ -99,7 +99,7 @@ pub fn generate(spec: &[ScSpecEntry]) -> String {
     // Filter out function entries with names that start with "__" and partition the results
     let (fns, other): (Vec<_>, Vec<_>) = collected
         .into_iter()
-        .filter(|entry| matches!(entry, Entry::Function { name, .. } if !name.starts_with("__")))
+        .filter(|entry| !matches!(entry, Entry::Function { name, .. } if name.starts_with("__")))
         .partition(|entry| matches!(entry, Entry::Function { .. }));
     let top = other.iter().map(entry_to_method_type).join("\n");
     let bottom = generate_class(&fns, spec);