chore(vale): upgrade to Vale 3.21.0

[github-actions]

The @taskless/vale-* packages are published ahead of what
@taskless/cli pins.

This moves all six pins from 3.20.0-20260907164938 to
3.21.0-20260915061224 — Vale 3.21.0 — and regenerates
pnpm-lock.yaml. The pins move together on purpose: the platform
packages are selected by optional dependency, so a straggler left at
the old version is a different Vale on one platform than on the others.

This is the half that reaches a user. Republishing the platform
packages changes nobody's install, because the CLI pins each one
exactly; merging this is what ships the new Vale.

This pull request rolls: if another set is published before it merges,
the branch, title, and body are rewritten to the newer version rather
than a second pull request being opened. Push a commit to the branch
and that stops — the workflow will not force-push over a commit it did
not write.

---

Upstream release notes — 3.21.0

https://github.com/vale-cli/vale/releases/tag/v3.21.0

doc(...) selections

A scope term that selects document elements by CSS selector, the same way in every format. Headings are wrapped in nested section elements first, so a rule can name a section:

extends: occurrence
message: "An ADR has a Decision section."
level: error
scope: 'doc(section:has(> h2:contains("Decision")))'
token: '(?s).'
min: 1

Alone, the selection is one block. Beside a scope, sentence & doc(...), it narrows that scope to the element. Negated, it excludes it. A metric rule with a scope now measures each block the scope names, so a section can have a word budget.

Docs: Selections, metric

TextFSM Views

A textfsm View reads plain text through a template in the form Google's TextFSM defined, run by Vale itself. What it captures becomes scopes placed at their line and column, so a rule can target a commit's subject or a transcript's turns. A conditional rule's new in key looks for second in another View scope, so a ! in a subject can require a BREAKING CHANGE: trailer.

Docs: TextFSM guide, conditional

Jupyter notebooks

.ipynb is a format: Markdown cells as Markdown, code cells as code in the kernel's language, outputs skipped. Alerts point into the notebook file itself.

Docs: Jupyter

Changelog

• ed711769 perf: index the walker's context instead of scanning it
• 252d0963 perf: index rune positions and resume column counts per block
• 0dfd6e82 chore: accept configs and docstring in vocab
• 9dfbc902 docs: add GitBook badge
• 7285105b docs: README
• 5992ffce docs: update README
• d0ea8b46 feat: apply BlockIgnores and TokenIgnores to HTML
• b4e2aa74 fix: keep the source's space between a dash and inline markup (#1177)
• 4774cedd fix: a sequence rule with a negated scope double-reports every match (#1169)
• 91af4046 fix: make the CLA bot signable
• 0f8ed52a feat: lint Jupyter notebooks as a format of their own
• 4da60aa6 feat: join a selected list into one value, so a notebook cell is one block
• 683a2f65 feat: let a conditional look for its consequent in another View scope
• 4c0f64f2 fix: apply a dasel View to any file its section matches
• 1734e780 feat: give an unfilled textfsm value an empty scope, so min can report it
• abbf2ec6 test: read past Git's comment lines in the commit View
• 7ebd026d fix: name the file and both dasel causes when a View selector fails
• 8aab425a fix: let a raw pattern contain a percent sign
• 0c35215c fix: place a zero-width match, and report a rule error under a View
• 1e4f6edc fix: keep a package's StylesPath out of the path list, and let the project's rule settings win
• c18dcab0 ci: tell the docs about a release
• e0a2250d feat: validate actions at load, carry their suggestions, and let edit run a pipeline
• d039c952 feat: read plain text through TextFSM templates as a view engine
• cfddd62e feat: select document elements with doc(...) and measure any block
• 42c3ba6f fix: keep a line break after inline markup (#1174)