Roll Dart Documentation Generator from 71545cdf2e5c to 9908cf86dd66 (2 revisions)

https://dart.googlesource.com/dartdoc/+log/71545cdf2e5c..9908cf86dd66

2022-10-04 49699333+dependabot[bot]@users.noreply.github.com Bump actions/cache from 3.0.8 to 3.0.10 (#3207)
2022-10-04 49699333+dependabot[bot]@users.noreply.github.com Bump github/codeql-action from 2.1.24 to 2.1.26 (#3206)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-doc-dart-sdk
Please CC dart-ecosystem-gardener@grotations.appspotmail.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Dart Documentation Generator: https://github.com/dart-lang/dartdoc/issues
To file a bug in Dart SDK: https://github.com/dart-lang/sdk/issues

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: dart-ecosystem-gardener@grotations.appspotmail.com
Change-Id: I6a2ac667e98c93879d05ad2f62239fc438726941
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/262641
Reviewed-by: Nate Bosch <nbosch@google.com>
Commit-Queue: Nate Bosch <nbosch@google.com>

DEPS

@@ -111,7 +111,7 @@ vars = {
   # For more details, see https://github.com/dart-lang/sdk/issues/30164.
   "dart_style_rev": "49bc3ff32b5578b6e19f8fd376d668130941ee29", # manually rev'd
 
-  "dartdoc_rev": "71545cdf2e5cc4ac3c8e81cbff3e1c91c6516f38",
+  "dartdoc_rev": "9908cf86dd66bce43cd4953cd1010766b01aae2b",
   "devtools_rev": "b21cd59f1f6bb60cacd59ba39e376d2a50d82f74",
   "ffi_rev": "fb5f2667826c0900e551d19101052f84e35f41bf",
   "file_rev": "b2e31cb6ef40b223701dbfa0b907fe58468484d7",