Bump x509-limbo and/or wycheproof in CI (#13922)

Co-authored-by: pyca-boringbot[bot] <pyca-boringbot[bot][email protected]>

Author: pyca-boringbot[bot]

.github/actions/fetch-vectors/action.yml

@@ -17,6 +17,6 @@ runs:
       with:
         repository: "C2SP/x509-limbo"
         path: "x509-limbo"
-        # Latest commit on the x509-limbo main branch, as of Nov 25, 2025.
-        ref: "b1e5bfa381ed42c6a73064b3b69f30e61ff3e299" # x509-limbo-ref
+        # Latest commit on the x509-limbo main branch, as of Nov 26, 2025.
+        ref: "4bea5d8dfedd871d480811e858f08bb4df8e799d" # x509-limbo-ref
         persist-credentials: false