Update naming in REST flowcharts

doc/src/guide/rest_get_head.svg

@@ -15,7 +15,7 @@
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doc/src/manual/cowboy_rest.asciidoc

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 === AcceptCallback
 
-// @todo The flowcharts should rename AcceptResource into AcceptCallback.
-
 [source,erlang]
 ----
 AcceptCallback(Req, State) -> {Result, Req, State}