schutzbot/mockbuild.sh: let mock bootstrap chroot

Don't instruct mock to not bootstrap the chroot. This is making builds
to fail on F40 due to DNF5. The error message suggests to bootstrap
chroot.

Example:
https://gitlab.com/redhat/services/products/image-builder/ci/osbuild/-/jobs/7239614060#L1363

Note that e.g. osbuild-composer does not specify the
--no-bootstrap-chroot option either.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

schutzbot/mockbuild.sh

@@ -135,7 +135,7 @@ sudo usermod -a -G mock "$(whoami)"
 
 # Compile RPMs in a mock chroot
 greenprint "🎁 Building RPMs with mock"
-mock -r $MOCK_CONFIG --no-bootstrap-chroot \
+mock -r $MOCK_CONFIG \
     --resultdir $REPO_DIR \
     rpmbuild/SRPMS/*.src.rpm
 sudo chown -R $USER ${REPO_DIR}