Revert "REVERT ME; CI fix"

This reverts commit 8be0d390931e66ee871c9bd2ea7fb700e27ff45e.

.github/workflows/user_project_ci.yml

diff --git a/.github/workflows/user_project_ci.yml b/.github/workflows/user_project_ci.yml
index 079175f..fd620d2 100644
--- a/.github/workflows/user_project_ci.yml
+++ b/.github/workflows/user_project_ci.yml
@@ -29,7 +29,7 @@
 
           - name: Download PDK
             run: |
-              MPW_TAG=volare_integration CARAVEL_LITE=0 make install
+              MPW_TAG=main CARAVEL_LITE=0 make install
               make pdk-with-volare
           
           - name: Run MPW-Precheck