chore: bump undici from 6.19.7 to 6.21.1 in /site (#16217)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

site/package.json

@@ -116,7 +116,7 @@
 		"tzdata": "1.0.40",
 		"ua-parser-js": "1.0.33",
 		"ufuzzy": "npm:@leeoniya/ufuzzy@1.0.10",
-		"undici": "6.19.7",
+		"undici": "6.21.1",
 		"unique-names-generator": "4.7.1",
 		"uuid": "9.0.1",
 		"yup": "1.4.0"

site/pnpm-lock.yaml

@@ -259,8 +259,8 @@ importers:
         specifier: npm:@leeoniya/ufuzzy@1.0.10
         version: '@leeoniya/ufuzzy@1.0.10'
       undici:
-        specifier: 6.19.7
-        version: 6.19.7
+        specifier: 6.21.1
+        version: 6.21.1
       unique-names-generator:
         specifier: 4.7.1
         version: 4.7.1
@@ -6149,8 +6149,8 @@ packages:
   undici-types@6.19.8:
     resolution: {integrity: sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==, tarball: https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz}
 
-  undici@6.19.7:
-    resolution: {integrity: sha512-HR3W/bMGPSr90i8AAp2C4DM3wChFdJPLrWYpIS++LxS8K+W535qftjt+4MyjNYHeWabMj1nvtmLIi7l++iq91A==, tarball: https://registry.npmjs.org/undici/-/undici-6.19.7.tgz}
+  undici@6.21.1:
+    resolution: {integrity: sha512-q/1rj5D0/zayJB2FraXdaWxbhWiNKDvu8naDT2dl1yTlvJp4BLtOcp2a5BvgGNQpYYJzau7tf1WgKv3b+7mqpQ==, tarball: https://registry.npmjs.org/undici/-/undici-6.21.1.tgz}
     engines: {node: '>=18.17'}
 
   unified@11.0.4:
@@ -12806,7 +12806,7 @@ snapshots:
 
   undici-types@6.19.8: {}
 
-  undici@6.19.7: {}
+  undici@6.21.1: {}
 
   unified@11.0.4:
     dependencies: