fixed issue for makepkg paru and Root execution on worflow container

.gitea/workflows/build_arch.yml

@@ -31,6 +31,6 @@ jobs:
       - name: Check out Repository
         uses: actions/checkout@v4
 
-      - name: Start setup proces
+      - name: Start setup process
         run: |
           ./setup.sh

dist/pacman.sh

@@ -35,7 +35,7 @@ else
         TEMP_USER="tempuser"
         useradd -m "$TEMP_USER"
         chown -R "$TEMP_USER":"$TEMP_USER" .
-        su -u "$TEMP_USER" -c "makepkg -si --noconfirm"
+        su "$TEMP_USER" -c "makepkg -si --noconfirm"
         userdel -r "$TEMP_USER"
     else
         echo "Building paru as user $USER..."