Update action.yml

Update upload-artifact to v4

Author: sunshaoce

.github/actions/install_llvm/action.yml

@@ -50,7 +50,7 @@ runs:
       shell: pwsh
 
     # Use default 90-day retention period
-    - uses: actions/upload-artifact@v3.1.2
+    - uses: actions/upload-artifact@v4
       with:
         name: llvm-inst
         path: "./llvm-project/inst"