Avoid use of the word "clobber" (#3611)

* Avoid use of the word "clobber"

Fixes https://github.com/matrix-org/matrix-doc/issues/1328

* changelog

changelogs/client_server/newsfragments/3611.clarification

@@ -0,0 +1 @@
+Fix various typos throughout the specification.

data/api/client-server/create_room.yaml

@@ -174,9 +174,9 @@ paths:
                 type: object
                 description: |-
                   Extra keys, such as `m.federate`, to be added to the content
-                  of the [`m.room.create`](/client-server-api/#mroomcreate) event. The server will clobber the following
+                  of the [`m.room.create`](/client-server-api/#mroomcreate) event. The server will overwrite the following
                   keys: `creator`, `room_version`. Future versions of the specification
-                  may allow the server to clobber other keys.
+                  may allow the server to overwrite other keys.
               initial_state:
                 type: array
                 description: |-