Remove usage of rapids-get-rapids-version-from-git (rapidsai#1436)

Instead of using `rapids-get-rapids-version-from-git` we can just hardcode the version and use `update-version.sh` to update it

Authors:
  - Jordan Jacobelli (https://github.com/jjacobelli)

Approvers:
  - AJ Schmidt (https://github.com/ajschmidt8)

URL: rapidsai#1436

ci/build_docs.sh

@@ -19,7 +19,7 @@ rapids-print-env
 rapids-logger "Downloading artifacts from previous jobs"
 CPP_CHANNEL=$(rapids-download-conda-from-s3 cpp)
 PYTHON_CHANNEL=$(rapids-download-conda-from-s3 python)
-VERSION_NUMBER=$(rapids-get-rapids-version-from-git)
+VERSION_NUMBER="23.06"
 
 rapids-mamba-retry install \
   --channel "${CPP_CHANNEL}" \

ci/release/update-version.sh

@@ -80,6 +80,7 @@ sed_runner "s/ucx-py.*\",/ucx-py==${NEXT_UCX_PY_SHORT_TAG_PEP440}.*\",/g" python
 for FILE in .github/workflows/*.yaml; do
   sed_runner "/shared-action-workflows/ s/@.*/@branch-${NEXT_SHORT_TAG}/g" "${FILE}"
 done
+sed_runner "s/VERSION_NUMBER=\".*/VERSION_NUMBER=\"${NEXT_SHORT_TAG}\"/g" ci/build_docs.sh
 
 sed_runner "/^PROJECT_NUMBER/ s|\".*\"|\"${NEXT_SHORT_TAG}\"|g" cpp/doxygen/Doxyfile