[CI] Non-sudo install of b2?

.github/workflows/nightly.yml

@@ -105,7 +105,7 @@ jobs:
         shell: bash
         run: |
           python -m pip install --upgrade pip
-          sudo pip install --upgrade b2
+          pip install --upgrade b2
       
       - name: Display Python version
         run: python -c "import sys; print(sys.version)"