[MISC] Update Cookbook

doc/cookbook/index.md

@@ -36,6 +36,7 @@ Search for keywords with `Strg + F`.
 \include test/snippet/ibf/interleaved_bloom_filter_constructor.cpp
 \include test/snippet/ibf/interleaved_bloom_filter_emplace.cpp
 \include test/snippet/ibf/interleaved_bloom_filter_increase_bin_number_to.cpp
+\include test/snippet/ibf/interleaved_bloom_filter_try_increase_bin_number_to.cpp
 \include test/snippet/ibf/membership_agent_bulk_contains.cpp
 \include test/snippet/ibf/membership_agent_construction.cpp
 \include test/snippet/readme.cpp