Update lean-toolchain for leanprover/lean4#10880

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 118ac20bc916 · 2025-10-22T00:14:06.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4-pr-releases:pr-release-10880-8f42ac6
+leanprover/lean4-pr-releases:pr-release-10880-1b09f03

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4-pr-releases:pr-release-10880-8f42ac6`
	`1`	`+leanprover/lean4-pr-releases:pr-release-10880-1b09f03`