release: update instructions

BUILD.bazel

@@ -17,7 +17,6 @@ pkg_tar(
     name = "bazel_lib",
     srcs = [
         "README.md",
-        "version.bzl",
         "//lib:package_content",
     ],
     extension = "tar.gz",

CONTRIBUTING.md

@@ -39,9 +39,9 @@ This means that any usage of `@aspect_bazel_lib` on your system will point to th
 
 ## Releasing
 
-1. Update the constant in `version.bzl`
-1. `git commit -a -m 'release'`
-1. `git tag v$(grep VERSION version.bzl | cut -d'"' -f2)`
-1. git push && git push --tags
+1. Make sure your git state is at the right place (something like `git fetch; git checkout origin/main`)
+1. Determine the next release version, following semver (could automate in the future from changelog)
+1. `git tag -a v1.2.3` (will open an editor to put release notes)
+1. `git push --tags`
 1. Watch the automation run on GitHub actions
 1. Update the release page with auto-generated release notes