Update lean-toolchain for leanprover/lean4#14316

Author: leanprover-bot

lake-manifest.json

@@ -5,7 +5,7 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "6fa80b667e82bebb1b067a3bf616202d0462498e",
+   "rev": "dbb0bc6e39e930dc62a7034c63bd730d3572f871",
    "name": "verso",
    "manifestFile": "lake-manifest.json",
    "inputRev": "nightly-testing",

lean-toolchain

@@ -1 +1 @@
-leanprover/lean4-pr-releases:pr-release-14316-526691f
+leanprover/lean4-pr-releases:pr-release-14316-6571bd0