Skip Ontobee in documentation external link check (#709)

The Ontobee server frequently times out during the Sphinx linkcheck build,
causing spurious failures in the doc-link-checks CI job. Add it to
linkcheck_ignore so the external link check no longer depends on its
availability.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: rly

CHANGELOG.md

@@ -6,6 +6,7 @@
 * Bumped GitHub Actions workflow dependencies (`actions/checkout` v4 -> v6, `actions/setup-python` v5 -> v6, `codecov/codecov-action` v4 -> v5) to migrate off Node.js 20, which GitHub is removing from runners on 2026-09-16. [#702](https://github.com/NeurodataWithoutBorders/nwbinspector/pull/702)
 
 ### Fixes
+* Skipped Ontobee in the documentation external link check, which frequently timed out and caused spurious CI failures. [#709](https://github.com/NeurodataWithoutBorders/nwbinspector/pull/709)
 * Fixed unit tests that failed at construction time against recent PyNWB and HDMF. [#707](https://github.com/NeurodataWithoutBorders/nwbinspector/pull/707)
 * Fixed `run_checks` raising `TypeError` when a `progress_bar_class` was passed without `progress_bar_options`; the keyword arguments are now coalesced to an empty dict before being forwarded to the progress-bar constructor. [#701](https://github.com/NeurodataWithoutBorders/nwbinspector/pull/701)
 

docs/conf.py

@@ -51,6 +51,12 @@
     "conf_py_path": "/docs/",
 }
 
+# linkcheck
+# Ontobee is frequently slow or unreachable, so external link checking skips it to avoid spurious failures.
+linkcheck_ignore = [
+    r"https://ontobee\.org/?.*",
+]
+
 # --------------------------------------------------
 # Extension configuration
 # --------------------------------------------------