update room spec url in config files (#11739)

* change spec url in config files

* Create 11739.txt

* .txt -> .doc

changelog.d/11739.doc

@@ -0,0 +1 @@
+Update room spec url in config files.

docs/sample_config.yaml

@@ -164,7 +164,7 @@ presence:
 # The default room version for newly created rooms.
 #
 # Known room versions are listed here:
-# https://matrix.org/docs/spec/#complete-list-of-room-versions
+# https://spec.matrix.org/latest/rooms/#complete-list-of-room-versions
 #
 # For example, for room version 1, default_room_version should be set
 # to "1".

synapse/config/server.py

@@ -883,7 +883,7 @@ class ServerConfig(Config):
         # The default room version for newly created rooms.
         #
         # Known room versions are listed here:
-        # https://matrix.org/docs/spec/#complete-list-of-room-versions
+        # https://spec.matrix.org/latest/rooms/#complete-list-of-room-versions
         #
         # For example, for room version 1, default_room_version should be set
         # to "1".