fix(ci): replace bare pnpm calls with vp in fresh-install-tests workflow

setup-vp does not put pnpm on PATH, so the direct pnpm invocations
failed with "command not found" (exit 127). vp update and vp dedupe
support the same flags and are the correct way to invoke pnpm under vp.

Author: nperez0111

.github/workflows/fresh-install-tests.yml

@@ -51,8 +51,6 @@ jobs:
         # ranges. This simulates what a user gets when running
         # `npm install @blocknote/react` in a fresh project.
         # DevDependencies are left at their lockfile versions.
-        # NB: this uses pnpm directly because vp doesn't expose a `--prod`-only
-        # update flow; setup-vp installs pnpm on PATH so this still works.
         run: |
           FILTERS=$(node -e "
             const fs = require('fs');
@@ -65,7 +63,7 @@ jobs:
             });
           ")
           echo "Updating prod deps for: $FILTERS"
-          eval pnpm update --prod $FILTERS
+          eval vp update --prod $FILTERS
 
       - id: dedupe_deps
         name: Dedupe transitive dependencies
@@ -78,7 +76,7 @@ jobs:
         # Dedupe only rewrites the lockfile — it does NOT modify package.json,
         # so the examples' "@blocknote/*": "latest" specs (which is what
         # CodeSandbox users see) stay intact.
-        run: pnpm dedupe
+        run: vp dedupe
 
       - id: build_packages
         name: Build packages