Rollup merge of rust-lang#151371 - blocked, r=Kobzol

Add `S-blocked` to `labels_blocking_approval`

r? @Kobzol

I think this makes sense, was this left out for a particular reason?

Author: JonathanBrouwer

rust-bors.toml

@@ -23,7 +23,9 @@ labels_blocking_approval = [
     "S-waiting-on-t-opsem",
     "S-waiting-on-t-rustdoc",
     "S-waiting-on-t-rustdoc-frontend",
-    "S-waiting-on-t-clippy"
+    "S-waiting-on-t-clippy",
+    # PR manually set to blocked
+    "S-blocked"
 ]
 
 # If CI runs quicker than this duration, consider it to be a failure