fix: remove explicit multipart content-type header from Cloudflare Pages deploy step

docs/operations/gitea-cloudflare.pages.md

@@ -100,7 +100,6 @@ If the `cloudflare/pages-action@v1` action is unavailable from Gitea, use the di
           curl -sS -X POST \
             "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/pages/projects/linearvoid/deployments" \
             -H "Authorization: Bearer ${CLOUDFLARE_API_TOKEN}" \
-            -H "Content-Type: multipart/form-data" \
             -F "commit_hash=${COMMIT_HASH}" \
             $form_args
 ```