Update lean-toolchain for testing leanprover/lean4#12247

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 120c3f447f0a · 2026-01-30T05:29:24.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2026-01-28
+leanprover/lean4-pr-releases:pr-release-12247-db28c82

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2026-01-28`
	`1`	`+leanprover/lean4-pr-releases:pr-release-12247-db28c82`