Add --upgrade to pip installs in setup script

Ensures packages are updated if already present on vast.ai instances.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

setup-vastai.sh

@@ -47,11 +47,11 @@ source venv/bin/activate
 
 # Install PyTorch with CUDA
 log "Installing PyTorch..."
-pip install --quiet torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu124
+pip install --quiet --upgrade torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu124
 
 # Install ComfyUI requirements
 log "Installing ComfyUI requirements..."
-pip install --quiet -r requirements.txt
+pip install --quiet --upgrade -r requirements.txt
 
 # ── Custom Node Requirements ─────────────────────────────────
 log "Installing custom node requirements..."
@@ -59,7 +59,7 @@ for req in custom_nodes/*/requirements.txt; do
     [ -f "$req" ] || continue
     node_name="$(basename "$(dirname "$req")")"
     log "  $node_name"
-    pip install --quiet -r "$req" 2>/dev/null || err "  Failed some deps in $node_name (may be OK)"
+    pip install --quiet --upgrade -r "$req" 2>/dev/null || err "  Failed some deps in $node_name (may be OK)"
 done
 
 # ── Download Models ───────────────────────────────────────────