tools: update dmn in update-estlint.sh

Version 2.1.0 of dmn will get rid of .map and .ts files.

Backport-PR-URL: #25965
PR-URL: #25877
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>

tools/update-eslint.sh

@@ -20,7 +20,7 @@ npm install --no-bin-links --production --no-package-lock eslint-plugin-markdown
 cd ../..
 
 # Use dmn to remove some unneeded files.
-npx dmn@2.0.0 -f clean
+npx dmn@2.1.0 -f clean
 # Use removeNPMAbsolutePaths to remove unused data in package.json.
 # This avoids churn as absolute paths can change from one dev to another.
 npx removeNPMAbsolutePaths@1.0.4 .