OpenAPI: use uri format

In avatar_url, pusher url, wellknown base_url, getUrlPreview, and submit_url.

Signed-off-by: Lukas Lihotzki <lukas@lihotzki.de>

data/api/client-server/content-repo.yaml

@@ -66,6 +66,7 @@ paths:
             properties:
               content_uri:
                 type: string
+                format: uri
                 description: "The [MXC URI](/client-server-api/#matrix-content-mxc-uris) to the uploaded content."
           examples:
             application/json: {
@@ -360,6 +361,7 @@ paths:
       parameters:
         - in: query
           type: string
+          format: uri
           x-example: "https://matrix.org"
           name: url
           description: "The URL to get a preview of."
@@ -389,6 +391,7 @@ paths:
                   The byte-size of the image. Omitted if there is no image attached.
               "og:image":
                 type: string
+                format: uri
                 description: |-
                   An [MXC URI](/client-server-api/#matrix-content-mxc-uris) to the image. Omitted if there is no image.
           examples: