Update lean-toolchain for leanprover/lean4#12228

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 256f7795643e · 2026-01-29T13:20:30.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4-pr-releases:pr-release-12228-bb338a9
+leanprover/lean4-pr-releases:pr-release-12228-2fb399c

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4-pr-releases:pr-release-12228-bb338a9`
	`1`	`+leanprover/lean4-pr-releases:pr-release-12228-2fb399c`