Write some notes on how to release

RELEASE.md

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+# Releasing `apple_rules_lint`
+
+1. Update the `MODULE.bazel` and bump the version number to whatever the 
+   next release will be.
+2. `git tag "${TAG}"` where `${TAG}` is whatever the next release will be.
+3. `./scripts/build-release-artifacts`
+4. Create a new release on GitHub, and attach the artifacts generated by the 
+   previous step.
+5. Update the BCR with the new release
+6. ...
+7. Profit!

scripts/build-release-artifacts

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+TAG="$1"
+git archive --format=tar --prefix=apple_rules_lint-"${TAG}"/ "${TAG}" | gzip > apple_rules_lint-"${TAG}".tar.gz