Auto merge of #3062 - pitaj:subtree-update, r=RalfJung

triagebot exclude_labels -> exclude_titles

https://github.com/rust-lang/triagebot/pull/1720

src/tools/miri/.github/workflows/ci.yml

@@ -208,7 +208,7 @@ jobs:
           git push -u origin $BRANCH
       - name: Create Pull Request
         run: |
-          PR=$(gh pr create -B master --title 'Automatic sync from rustc' --body '' --label subtree-sync)
+          PR=$(gh pr create -B master --title 'Automatic sync from rustc' --body '')
           ~/.local/bin/zulip-send --user $ZULIP_BOT_EMAIL --api-key $ZULIP_API_TOKEN --site https://rust-lang.zulipchat.com \
             --stream miri --subject "Cron Job Failure (miri, $(date -u +%Y-%m))" \
             --message "A PR doing a rustc-pull [has been automatically created]($PR) for your convenience."

src/tools/miri/miri-script/src/commands.rs

@@ -339,9 +339,9 @@ impl Command {
             "Confirmed that the push round-trips back to Miri properly. Please create a rustc PR:"
         );
         println!(
-            // Open PR with `subtree-sync` label to satisfy the `no-merges` triagebot check
+            // Open PR with `subtree update` title to silence the `no-merges` triagebot check
             // See https://github.com/rust-lang/rust/pull/114157
-            "    https://github.com/rust-lang/rust/compare/{github_user}:{branch}?quick_pull=1&labels=subtree-sync"
+            "    https://github.com/rust-lang/rust/compare/{github_user}:{branch}?quick_pull=1&title=Miri+subtree+update"
         );
 
         drop(josh);

src/tools/miri/triagebot.toml

@@ -11,4 +11,4 @@ allow-unauthenticated = [
 [shortcut]
 
 [no-merges]
-exclude_labels = ["rollup", "subtree-sync"]
+exclude_titles = ["Rollup of", "sync from rustc"]