OPENSUSE-SU-2026:21339-1 Security update for python-mistune

This update for python-mistune fixes the following issues - CVE-2026-59922: quadratic-time parsing on long runs of some markers in formatting.py can lead to DoS bsc1271117. - CVE-2026-59923: HTMLRenderer.safeurl does not block percent-encoded javascript URIs and allows for XSS bsc1271119. -...