Add python-tuf audit by x41

Signed-off-by: Joshua Lock <jlock@vmware.com>

Author: joshuagl

content/audits.md

@@ -4,6 +4,8 @@ title: Security audits
 
 > **Note**: This list only contains publicly available audits.
 
+* [September 9, 2022 by X41](/audits/x41-python-tuf-audit-2022-09-09.pdf)
+
 * [August 7, 2018 by Cure53](https://github.com/theupdateframework/notary/blob/master/docs/resources/cure53_tuf_notary_audit_2018_08_07.pdf) covering TUF and Notary
 
 * [October 18, 2017 by NCC](https://www.nccgroup.trust/globalassets/our-research/us/public-reports/2017/ncc-group-kolide-the-update-framework-security-assessment.pdf) security assessment of TUF / Kolide.