Update lean-toolchain for testing leanprover/lean4#12748

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 69c92f08ae50 · 2026-03-09T21:40:17.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2026-03-05
+leanprover/lean4-pr-releases:pr-release-12748-9f7df0e

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2026-03-05`
	`1`	`+leanprover/lean4-pr-releases:pr-release-12748-9f7df0e`