Update lean-toolchain for testing leanprover/lean4#2621

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 1e34b2300309 · 2023-10-04T05:47:52.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2023-10-03
+leanprover/lean4-pr-releases:pr-release-2621

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2023-10-03`
	`1`	`+leanprover/lean4-pr-releases:pr-release-2621`