notes how to upgrade HW (#92)

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.azure/README.md

@@ -1,5 +1,36 @@
 # Creation HPU self-hosted agent pool
 
+## Upgrade machine
+
+In general follow instructions in [Bare Metal Fresh OS Installation](https://docs.habana.ai/en/v1.10.0/Installation_Guide/Bare_Metal_Fresh_OS.html#) and in particular [Habana Driver Unattended Upgrade](https://docs.habana.ai/en/v1.10.0/Installation_Guide/Bare_Metal_Fresh_OS.html#habana-driver-unattended-upgrade).
+
+1. check what is the actual state and version of HW - `hl-smi`
+1. check the actual OS version - `lsb_release -a`
+1. update sources - `sudo apt update --fix-missing`
+1. run upgrade to the latest - `sudo apt upgrade`
+1. reboot the machine...
+
+### Troubleshooting
+
+In some cases you may get stack with hanged libs linked to past kernel (for example `sudo apt purge habanalabs-dkms` errors), in such case do not follow with purge old libs and just continue with new
+
+1. list available libs: `sudo apt list | grep habana | grep 1.12`
+1. install all libs from the output list above:
+   ```bash
+   sudo apt install \
+     habanalabs-container-runtime \
+     habanalabs-dkms \
+     habanalabs-firmware-tools \
+     habanalabs-firmware \
+     habanalabs-graph \
+     habanalabs-qual \
+     habanalabs-rdma-core \
+     habanalabs-thunk \
+     habanatools
+   ```
+
+Overall if you touch kernel version, follow with reboot before any eventual other updates.
+
 ## Prepare the machine
 
 This is a slightly modified version of the script from