Update lean-toolchain for testing leanprover/lean4#9311

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit c0bf938d1877 · 2025-07-11T15:47:31.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2025-07-10
+leanprover/lean4-pr-releases:pr-release-9311-9a91298

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2025-07-10`
	`1`	`+leanprover/lean4-pr-releases:pr-release-9311-9a91298`