/usr/share/doc/auditd/examples/rules/22-ignore-chrony.rules is in auditd 1:2.6.7-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | ## This rule suppresses the time-change event when chrony does time updates
-a never,exit -F arch=b64 -S adjtimex -F auid=unset -Fuid=chrony -F subj_type=chronyd_t
-a never,exit -F arch=b32 -S adjtimex -F auid=unset -Fuid=chrony -F subj_type=chronyd_t
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