Build cpuonly from bitsandbytes main (#70)

Build cpuonly from main

.github/workflows/run-tests.yaml

@@ -69,7 +69,7 @@ jobs:
         run: |
           git clone https://github.com/TimDettmers/bitsandbytes.git
           cd bitsandbytes
-          git checkout 4cd7ea62b2f51c68aacde2f62e7141765e476111
+          git checkout main
           make cpuonly
           pip install .
           cd -