Bump x509-limbo and/or wycheproof in CI (#12351)

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

Author: pyca-boringbot[bot]

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

@@ -16,5 +16,5 @@ runs:
       with:
         repository: "C2SP/x509-limbo"
         path: "x509-limbo"
-        # Latest commit on the x509-limbo main branch, as of Jan 22, 2025.
-        ref: "8423b985e8fcda09433bcc2f0d04d9f2c3f84722" # x509-limbo-ref
+        # Latest commit on the x509-limbo main branch, as of Jan 28, 2025.
+        ref: "983d753a1f90dd9bcea3e8262872a51c6ab33c9e" # x509-limbo-ref