Update lean-toolchain for testing leanprover/lean4#8002

leanprover-community-mathlib4-bot · leanprover-community-mathlib4-bot · commit e5e848e926be · 2025-04-17T17:45:50.000Z
diff --git a/lean-toolchain b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2025-04-16
+leanprover/lean4-pr-releases:pr-release-8002

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-leanprover/lean4:nightly-2025-04-16`
	`1`	`+leanprover/lean4-pr-releases:pr-release-8002`