[DOCS] reworded to prevent code span rendering glitch
Changed `rescore`s to `rescore` requests as an backtick followed by the s character appears to be interpreted as an apostrophe  which then leads to an unbalanced backtick for the next code span in the remainder of the paragraph
Closes
@@ -120,7 +120,7 @@ specific index module:
`index.max_rescore_window`::
- The maximum value of `window_size` for `rescore`s in searches of this index.
+ The maximum value of `window_size` for `rescore` requests in searches of this index.
Defaults to `index.max_result_window` which defaults to `10000`. Search
requests take heap memory and time proportional to
`max(window_size, from + size)` and this limits that memory.
