Document RSA key requirement for Jenkins SSH on Windows.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: baasith6

docs/JENKINS_DEPLOY.md

@@ -14,7 +14,7 @@ Deploy ONEVO to the Azure MVP VM from your local Windows PC using the root [`Jen
 2. **Git** and **OpenSSH client** (Windows 10+ optional feature or Git for Windows).
 3. **.NET 8 SDK**, **Node.js 20**, **Python 3.11+** on the Jenkins agent (same PC).
 4. **Inno Setup 6** + PyInstaller deps for connector installer (see [`connector/installer/INSTALL.md`](../connector/installer/INSTALL.md)).
-5. SSH private key that can log in as `azureuser@20.193.69.220`.
+5. SSH private key that can log in as `azureuser@20.193.69.220`. On Windows OpenSSH, use your **RSA** key (`id_rsa`) in Jenkins — explicit `-i` with `id_ed25519` often fails even when plain `ssh` works.
 
 ## Jenkins plugins
 
@@ -27,7 +27,7 @@ Deploy ONEVO to the Azure MVP VM from your local Windows PC using the root [`Jen
 
 | ID | Type | Value |
 |----|------|--------|
-| `onevo-vm-ssh-key` | SSH Username with private key | User `azureuser`, paste private key |
+| `onevo-vm-ssh-key` | SSH Username with private key | User `azureuser`, paste **RSA** private key (`id_rsa` contents, not ed25519) |
 
 ## Create the pipeline job