Update update_documentation.yml

[Prasanna-Ponnusamy]

Please recheck if I added the right path

Describe your changes here:

All these boxes must be checked by the reviewers before merging the pull request:

As a reviewer please read through all the code lines and make sure that the code is fully understood, bug free, well-documented and well-structured.

• The author added a BSD statement to doc/ (or already has one)

• The code compiles without warning in debugging and release mode, with and without MPI (this should be executed automatically in a github action)

  If the Pull request introduces code that is not covered by the github action (for example coupling with a new library):

  • Should this use case be added to the github action?
  • If not, does the specific use case compile and all tests pass (check manually)

• All tests pass (in various configurations, this should be executed automatically in a github action)

• New source/header files are properly added to the Makefiles

• New Datatypes are added to t8indent_custom_datatypes.txt

• The reviewer executed the new code features at least once and checked the results manually

• The code is covered in an existing or new test case

• New tests use the Google Test framework

• The code follows the t8code coding guidelines

• The code is well documented

• All function declarations, structs/classes and their members have a proper doxygen documentation

• All new algorithms and data structures are sufficiently optimal in terms of memory and runtime (If this should be merged, but there is still potential for optimization, create a new issue)

• If a new directory with source-files is added, it must be covered by the script/find_all_source_files.scp to check the indentation of these files.

• If this PR introduces a new feature, it must be covered in an example/tutorial and a Wiki article.

[sandro-elsweijer]

Please do the change also here:
https://github.com/DLR-AMR/t8code/blob/main/.github/workflows/add_release_documentation.yml#L125
We have one Workflow to upload the latest documentation of the main branch and one workflow to add a documentation if a new major or minor release takes place. Both are affected.

[Prasanna-Ponnusamy]

Thank you Sandro!

[sandro-elsweijer]

lgtm