message: Adds Danger rule from
diff: @@ -44,6 +44,11 @@ if (modifiedAppFiles.length > 0 && !trivialPR && !changelogChanges) {
  fail("No CHANGELOG added.")
  }
  +// Check that the changelog contains only H3's
  +if (changelogChanges && fs.readFileSync("CHANGELOG.md", "utf8").includes("\n## ")) {
  + fail("Changelog must only contain H3's, but contains H2's.")
  +}
  +
  // Check that every file touched has a corresponding test file
  const correspondingTestsForAppFiles = touchedAppOnlyFiles.map(f => {
  const newPath = path.dirname(f)
  