chore: update bootstrap extensions (charliermarsh.ruff) (#13713)

### Summary
Update bootstrap extensions detected as out-of-date by the nightly
check.

- charliermarsh.ruff

### QA Notes
Triggered by [nightly extensions
check](https://github.com/posit-dev/positron/actions/runs/26266148306).

Co-authored-by: positron-bot[bot] <positron-bot[bot]@users.noreply.github.com>

Author: positron-bot[bot]

product.json

@@ -106,7 +106,7 @@
 	"bootstrapExtensions": [
 		{
 			"name": "charliermarsh.ruff",
-			"version": "2026.42.0",
+			"version": "2026.44.0",
 			"repo": "https://github.com/astral-sh/ruff-vscode",
 			"metadata": {
 				"publisherId": {