ci: pin Biome to 2.4.13 in auto-format workflow

CI used npx @biomejs/biome@latest, which drifted to 2.5.0 and failed
the format job (deprecated config fields + stricter parsing of existing
files like public/resnet50.svg) on unrelated PRs. Pin to the version
already in package.json so CI matches local and pre-commit runs.

.github/workflows/auto-format.yml

@@ -23,7 +23,9 @@ jobs:
           node-version: '24'
 
       - name: Run Biome format
-        run: npx @biomejs/biome@latest check --write --no-errors-on-unmatched .
+        # Pin to the version in package.json so CI matches local/pre-commit
+        # (npx @latest drifts — e.g. 2.5.0 broke this job on unrelated PRs).
+        run: npx @biomejs/biome@2.4.13 check --write --no-errors-on-unmatched .
 
       - name: Check for changes
         id: changes