DOC: lua: fix filters.txt file location

At the beginning of the filter class section, we encourage the user to
check out filters.txt file to get to know how the filters API works
within haproxy.

However the file location is incorrect. The proper directory to look for
the file is: doc/internals/api.

It should be backported up to 2.5.

diff --git a/doc/lua-api/index.rst b/doc/lua-api/index.rst
index 8674d57eb70061a4b8cfd26f72381e8cecf6f292..0d69a2f81bb91fb7867c0269637785d1aef7e4b5 100644 (file)
--- a/doc/lua-api/index.rst
+++ b/doc/lua-api/index.rst
@@ -3929,7 +3929,7 @@ Filter class
 
   This class contains return codes some filter callback functions may return. It
   also contains configuration flags and some helper functions. To understand how
-  the filter API works, see `doc/internal/filters.txt` documentation.
+  the filter API works, see `doc/internals/api/filters.txt` documentation.
 
 .. js:attribute:: filter.CONTINUE