Update lean-toolchain for testing leanprover/lean4#10807

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 9e4f9fb25f1e · 2025-10-16T16:36:29.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2025-10-13
+leanprover/lean4-pr-releases:pr-release-10807-e50d26b

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2025-10-13`
	`1`	`+leanprover/lean4-pr-releases:pr-release-10807-e50d26b`