chore: update date and add thanks section

- update date to 2025-11-20
- add thanks section with PR 497 contributors (alphabetically):
  - Adin Schmahmann
  - Alex Potsides
  - Marcin Rataj

Author: lidel

src/routing/kad-dht.md

@@ -5,7 +5,7 @@ description: >
   overlay network used for peer and content routing in the InterPlanetary File
   System (IPFS). It extends the libp2p Kademlia DHT specification, adapting and
   adding features to support IPFS-specific requirements.
-date: 2025-03-24
+date: 2025-11-20
 maturity: reliable
 editors:
   - name: Guillaume Michel
@@ -14,6 +14,22 @@ editors:
     affiliation:
       name: Shipyard
       url: https://ipshipyard.com
+thanks:
+  - name: Adin Schmahmann
+    github: aschmahmann
+    affiliation:
+      name: Shipyard
+      url: https://ipshipyard.com
+  - name: Alex Potsides
+    github: achingbrain
+    affiliation:
+      name: Shipyard
+      url: https://ipshipyard.com
+  - name: Marcin Rataj
+    github: lidel
+    affiliation:
+      name: Shipyard
+      url: https://ipshipyard.com
 tags: ['routing']
 order: 1
 ---