check_dataset_allowlist: drop instance repo names from docstring (#152)

The guard's docstring named specific workspaces (autofit_workspace, HowTo*)
as an example of the un-adopted case, tripping repos_sync's tenant-firewall
(instance fact in an unlisted organ file). The names are purely illustrative,
so genericise the sentence — keeps the file fork-clean without growing
FIREWALL_ALLOWLIST. repos_sync --check now green.

Co-authored-by: Jammy2211 <jnightingale2211@gmail.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: 3 people

autobuild/check_dataset_allowlist.py

@@ -13,9 +13,9 @@
 the parsed allowlist directly.
 
 Allowlist-presence-gated: a workspace whose `.gitignore` has a bare `dataset/`
-rule with no `!dataset/...` re-includes (autofit_workspace, HowTo*) has not yet
-adopted the allowlist regime (Group B, PyAutoBuild#126) — the guard skips it with
-a notice rather than failing, until that repo opts in.
+rule with no `!dataset/...` re-includes has not yet adopted the allowlist regime
+(Group B, PyAutoBuild#126) — the guard skips it with a notice rather than
+failing, until that repo opts in.
 
 Run from a workspace root. Exit 0 = clean/skipped, 1 = violation.
 """