chore(deps): bump pnpm to v8.15.5

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

package.json

@@ -4,7 +4,7 @@
   "version": "0.0.0-development",
   "description": "Package-based monorepo for @openinf/util-object and friends",
   "workspaces": ["packages/*"],
-  "packageManager": "pnpm@8.6.3",
+  "packageManager": "pnpm@8.15.5",
   "license": "MIT OR Apache-2.0",
   "author": "The OpenINF Authors",
   "devDependencies": {