SUSE: Important DoS Threat Update for python-tornado6 CVE-2025-67724

## This update for python-tornado6 fixes the following issues: * CVE-2025-67724: unescaped `reason` argument used in HTTP headers and in HTML default error pages can be used by attackers to launch header injection or XSS attacks (bsc#1254903). * CVE-2025-67725: quadratic complexity of string concatenation operations used by the `HTTPHeaders.add` method can lead to DoS when processing a maliciously crafted HTTP request (bsc#1254905). * CVE-2025-67726: quadratic complexity algorithm used in the `_parseparam` function of `httputil.py` can lead to DoS when processing maliciously crafted parameters in a `Content-Disposition` header (bsc#1254904). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".