Update lean-toolchain for testing leanprover/lean4#10215

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 6be0affb2ee2 · 2025-09-02T12:16:50.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2025-08-31
+leanprover/lean4-pr-releases:pr-release-10215-23d9c3a

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2025-08-31`
	`1`	`+leanprover/lean4-pr-releases:pr-release-10215-23d9c3a`