set name and email for lerna commits

Author: kmer2016

.github/workflows/osrd-ui-publish.yml

@@ -21,6 +21,8 @@ jobs:
           npm run build
           VERSION=${GITHUB_REF/refs\/tags\//}
           lerna version $VERSION --no-private --no-git-tag-version --yes
+          git config user.name "OSRD GitHub Actions"
+          git config user.email "[email protected]"
           git commit -am "Commit changes made by Lerna"
           lerna publish
         env: