fix: mmseqs --threads arg

After #115 where I tested mmseqs errors, I forgot to flip back the `--threads` arg to the correct spelling.

Author: ivan-aksamentov

packages/pangraph/src/align/mmseqs/align_with_mmseqs.rs

@@ -42,7 +42,7 @@ pub fn align_with_mmseqs(
     &input_path,
     &output_path,
     &tmp_path,
-    "--thread",
+    "--threads",
     "1",
     "--max-seq-len",
     "10000",