fix: correct ignored filename extensions (#4042)

Author: glasnt

.github/config/nodejs-dev.jsonc

@@ -36,9 +36,9 @@
     ".github/ISSUE_TEMPLATE/",
     ".github/PULL_REQUEST_TEMPLATE.md",
     ".github/auto-label.yaml",
-    ".github/blunderbuss.yaml",
+    ".github/blunderbuss.yml",
     ".github/flakybot.yaml",
-    ".github/header-checker-lint.yaml",
+    ".github/header-checker-lint.yml",
     ".github/scripts/",
     ".github/snippet-bot.yml",
     ".github/trusted-contribution.yml",

.github/config/nodejs-prod.jsonc

@@ -36,9 +36,9 @@
     ".github/ISSUE_TEMPLATE/",
     ".github/PULL_REQUEST_TEMPLATE.md",
     ".github/auto-label.yaml",
-    ".github/blunderbuss.yaml",
+    ".github/blunderbuss.yml",
     ".github/flakybot.yaml",
-    ".github/header-checker-lint.yaml",
+    ".github/header-checker-lint.yml",
     ".github/scripts/",
     ".github/snippet-bot.yml",
     ".github/trusted-contribution.yml",