DOC: checkcache: block responses with cacheable cookies

"requests" -> "responses"

Signed-off-by: Godbach <nylzhaowei@gmail.com>
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 1d13c1e..dda20e3 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -3518,7 +3518,7 @@
 
 option checkcache
 no option checkcache
-  Analyze all server responses and block requests with cacheable cookies
+  Analyze all server responses and block responses with cacheable cookies
   May be used in sections :   defaults | frontend | listen | backend
                                  yes   |     no   |   yes  |   yes
   Arguments : none