update label names for check_labels job

polkadot/scripts/gitlab/check_labels.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+#shellcheck source=lib.sh
+source "$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )/lib.sh"
+
+# Must have one of the following labels
+labels=(
+  'B0-silent'
+  'B1-releasenotes'
+  'B2-runtimenoteworthy'
+)
+
+echo "[+] Checking labels for $CI_COMMIT_BRANCH"
+
+for label in "${labels[@]}"; do
+  if has_label 'paritytech/polkadot' "$CI_COMMIT_BRANCH" "$label"; then
+    echo "[+] Label $label detected, test passed"
+    exit 0
+  fi
+done
+
+echo "[!] PR does not have one of the required labels! Please add one of: ${labels[*]}"
+exit 1