Update lean-toolchain for testing leanprover/lean4#3958

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 4401c25bf29f · 2024-04-20T14:37:45.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2024-04-20
+leanprover/lean4-pr-releases:pr-release-3958

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2024-04-20`
	`1`	`+leanprover/lean4-pr-releases:pr-release-3958`