DOC: Fix typo in keyword matrix
It should read 'deprecated' instead of 'deprectated'.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 80c3286..1fbe452 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -2284,7 +2284,7 @@
option contstats (*) X X X -
option dontlog-normal (*) X X X -
option dontlognull (*) X X X -
-option forceclose (deprectated) (*) X X X X
+option forceclose (deprecated) (*) X X X X
-- keyword -------------------------- defaults - frontend - listen -- backend -
option forwardfor X X X X
option http-buffer-request (*) X X X X