base: bump common to 1.8.1. (#628)

Author: dajiaji

npm/import_map.json

@@ -3,7 +3,7 @@
     "@dajiaji/mlkem": "npm:mlkem@^2.5.0",
     "@deno/dnt": "jsr:@deno/[email protected]",
     "@hpke/chacha20poly1305": "npm:@hpke/chacha20poly1305@^1.7.0",
-    "@hpke/common": "npm:@hpke/common@^1.8.0",
+    "@hpke/common": "npm:@hpke/common@^1.8.1",
     "@hpke/core": "npm:@hpke/core@^1.7.3",
     "@hpke/dhkem-x25519": "npm:@hpke/dhkem-x25519@^1.6.3",
     "@hpke/dhkem-x448": "npm:@hpke/dhkem-x448@^1.6.3",