chore: keep flakybot.yml ignored, remove in later PR

Author: briandorsey

.github/config/nodejs-dev.jsonc

@@ -37,6 +37,7 @@
     ".github/PULL_REQUEST_TEMPLATE.md",
     ".github/auto-label.yaml",
     ".github/blunderbuss.yml",
+    ".github/flakybot.yaml",
     ".github/header-checker-lint.yml",
     ".github/scripts/",
     ".github/snippet-bot.yml",

.github/config/nodejs.jsonc

@@ -37,6 +37,7 @@
     ".github/PULL_REQUEST_TEMPLATE.md",
     ".github/auto-label.yaml",
     ".github/blunderbuss.yml",
+    ".github/flakybot.yaml",
     ".github/header-checker-lint.yml",
     ".github/scripts/",
     ".github/snippet-bot.yml",