Update lean-toolchain for testing leanprover/lean4#8380

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit 463adec4b011 · 2025-05-20T12:56:57.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2025-05-19
+leanprover/lean4-pr-releases:pr-release-8380

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2025-05-19`
	`1`	`+leanprover/lean4-pr-releases:pr-release-8380`