[CI] Changed dev wheel date to UTC time to match CRON schedule (#587)

.github/workflows/wheels.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Patch setup.py
         run: |
           #sed -i 's/name\=\"triton\"/name="triton-nightly"/g' python/setup.py
-          export LATEST_DATE=$(git show -s --format=%ci `git rev-parse HEAD` | cut -d ' ' -f 1 | sed 's/-//g')
+          export LATEST_DATE=$(TZ=UTC0 git show --quiet --date='format-local:%Y%m%d' --format="%cd")
           sed -i -r "s/version\=\"(.*)\"/version=\"\1-dev"$LATEST_DATE"\"/g" python/setup.py
           echo "" >> python/setup.cfg
           echo "[build_ext]" >> python/setup.cfg