[jdk26] RFR: 8374044: Docs build fails: Cannot determine current path

[Dan Smith]

This pull request contains a backport of commit [f88cbfb8](https://github.com/openjdk/jdk/commit/f88cbfb8c6b320f773f8d8c3cdf2598d117c5521) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Dan Smith on 18 Dec 2025 and was reviewed by David Holmes.

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Commit messages:
 - Backport f88cbfb8c6b320f773f8d8c3cdf2598d117c5521

Changes: https://git.openjdk.org/jdk/pull/28913/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28913&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374044
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28913.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28913/head:pull/28913

PR: https://git.openjdk.org/jdk/pull/28913