triagebot: label minicore changes w/ A-test-infra-minicore

And ping jieyouxu on changes.

Author: jieyouxu

triagebot.toml

@@ -585,6 +585,11 @@ trigger_files = [
     "src/tools/compiletest"
 ]
 
+[autolabel."A-test-infra-minicore"]
+trigger_files = [
+    "tests/auxiliary/minicore.rs",
+]
+
 [autolabel."A-rustc-dev-guide"]
 trigger_files = [
     "src/doc/rustc-dev-guide",
@@ -869,6 +874,10 @@ cc = ["@GuillaumeGomez"]
 message = "This PR modifies `run-make` tests."
 cc = ["@jieyouxu"]
 
+[mentions."tests/auxiliary/minicore.rs"]
+message = "This PR modifies `tests/auxiliary/minicore.rs`."
+cc = ["@jieyouxu"]
+
 [mentions."src/rustdoc-json-types"]
 message = """
 rustdoc-json-types is a **public** (although nightly-only) API. \