MINOR: doc: 2.4. Examples should be 2.5. Examples

Guillaume Michaud reported against Cyril's haproxy-dconv project
that the index for the Examples section should be 2.5 instead of
2.4.

Should be backported to 1.7 and 1.6, so that the example section
can be linked to:
https://cbonte.github.io/haproxy-dconv/1.6/configuration.html#2.5
1 file changed