Update pnpm to v9.15.9 (#1729)

Author: renovate[bot]

package.json

@@ -89,7 +89,7 @@
   "volta": {
     "node": "20.18.3"
   },
-  "packageManager": "[email protected].6",
+  "packageManager": "[email protected].9",
   "pnpm": {
     "patchedDependencies": {
       "panzoom": "patches/panzoom.patch",