Docs: Drop inline callout from scroll example (#38340)

Coalesces two calls into one in a scroll example so all callouts are at
the end of the line. This is the only sort of callouts that are
supported by asciidoctor and we'd like to start building our docs with
asciidoctor.

At present we don't have any mechanism to stop folks adding more inline
callouts but we ought to be able to have one in a few weeks. For now,
though, removing these inline callouts is a step in the right direction.

Relates to #38335

docs/reference/search/request/scroll.asciidoc

@@ -55,16 +55,15 @@ results.
 
 [source,js]
 --------------------------------------------------
-curl -XGET <1> 'localhost:9200/_search/scroll?scroll=1m' <2> <3> \
-     -d       'c2Nhbjs2OzM0NDg1ODpzRlBLc0FXNlNyNm5JWUc1' <4>
+curl -XGET 'localhost:9200/_search/scroll?scroll=1m' \ <1>
+     -d    'c2Nhbjs2OzM0NDg1ODpzRlBLc0FXNlNyNm5JWUc1'  <2>
 --------------------------------------------------
-<1> `GET` or `POST` can be used.
-<2> The URL should not include the `index` or `type` name -- these
-    are specified in the original `search` request instead.
-<3> The `scroll` parameter tells Elasticsearch to keep the search context open
+<1> `GET` or `POST` can be used and the URL should not include the `index`
+    or `type` name -- this is specified in the original `search` request instead.
+    The `scroll` parameter tells Elasticsearch to keep the search context open
     for another `1m`.
-<4> The returned `_scroll_id` attribute can be passed in the request body or in the
-    query string as `?scroll_id=....`
+<2> The returned `_scroll_id` attribute can be passed in the request body or in
+    the query string as `?scroll_id=....`
 
 Each call to the `scroll` API returns the next batch of results until there
 are no more results left to return, ie the `hits` array is empty.