FIX Use different doc builder docker image (#1697)

Same as in:

https://github.com/huggingface/transformers/blob/c712d05aa8fc8ba3ebe465079bd377d2dc9c2e07/.github/workflows/build_documentation.yml#L19

Author: BenjaminBossan

.github/workflows/build_documentation.yml

@@ -14,6 +14,7 @@ jobs:
       commit_sha: ${{ github.sha }}
       package: peft
       notebook_folder: peft_docs
+      custom_container: huggingface/transformers-doc-builder
     secrets:
       token: ${{ secrets.HUGGINGFACE_PUSH }}
-      hf_token: ${{ secrets.HF_DOC_BUILD_PUSH }}
+      hf_token: ${{ secrets.HF_DOC_BUILD_PUSH }}

.github/workflows/build_pr_documentation.yml

@@ -14,3 +14,4 @@ jobs:
       commit_sha: ${{ github.event.pull_request.head.sha }}
       pr_number: ${{ github.event.number }}
       package: peft
+      custom_container: huggingface/transformers-doc-builder