Fix RST syntax error in the README

Author: juledwar

README.rst

@@ -82,6 +82,7 @@ fixture is known to work all the way back to v11.
 If you are already running inside Docker you will need to start the
 container with `--network-"host"` so that 127.0.0.1 routes to the started
 PG containers. You will need to do up to two extra things:
+
  1. Bind mount /var/run/docker.sock to the container so docker clients
     can create sibling containers on the host.
  2. If you cannot use host networking, supply the IP address of the

pyproject.toml

@@ -75,7 +75,9 @@ scripts.debug = ["python -m testtools.run discover -v -s dbtesttools/tests -t {r
 scripts.py3 = ["stestr run --concurrency 2 -t dbtesttools/tests --top-dir {root} {args}"]
 scripts.formatcheck = [
     "ruff format --check dbtesttools",
-    "ruff check --select I --show-fixes dbtesttools"
+    "ruff check --select I --show-fixes dbtesttools",
+    "hatch build",
+    "twine check dist/*",
 ]
 scripts.format = [
     "ruff check --select I --fix-only --show-fixes dbtesttools",