Bump nox from 2024.10.09 to 2025.5.1 in /.github/workflows

Dependabot couldn't find the original pull request head commit, 55fa030.

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -1,3 +1,3 @@
 pip==24.3.1
-nox==2024.10.09
+nox==2025.5.1
 virtualenv==20.34.0