[Docs] Update pytorch docs to add support for Ubuntu 24.04

Signed-off-by: Adarsh Anand <[email protected]>

Documentation/tutorials/pytorch/index.rst

@@ -1,12 +1,6 @@
 PyTorch PPML Framework Tutorial
 ===============================
 
-.. warning::
-
-   This tutorial is outdated and may not work on the current Gramine version /
-   currently supported Linux distributions. Contributions to refresh it are
-   welcomed!
-
 .. highlight:: sh
 
 This tutorial presents a framework for developing PPML (Privacy-Preserving
@@ -91,15 +85,29 @@ user who will decrypt it and analyze its contents.
 Prerequisites
 -------------
 
-- Ubuntu 20.04.
+- A Linux-based operating system (e.g., Ubuntu 20.04 or later)
 
 - PyTorch (Python3). PyTorch is a framework for machine learning based on
   Python. Please `install PyTorch <https://pytorch.org/get-started/locally/>`__
   before you proceed (don't forget to choose Linux as the target OS and CPU as
   the compute platform).
 
-- Gramine v1.5, with DCAP support. DCAP software infrastructure must also be
-  installed.
+- Gramine v1.8, with DCAP support. DCAP software infrastructure must also be
+   installed. Please refer to the `Gramine Attestation Documentation
+   <https://gramine.readthedocs.io/en/latest/attestation.html>`__ for more details.
+
+
+.. warning::
+
+   After running Ubuntu 24.04, it is highly recommended to use a virtual environment to manage
+   dependencies. You can create and activate a virtual environment with the
+   following commands:
+
+   .. code-block:: sh
+
+      sudo apt install python3-venv
+      python3 -m venv my_venv
+      source my_venv/bin/activate
 
 Executing Native PyTorch
 ------------------------
@@ -113,7 +121,7 @@ example as a basis and will improve it to protect all user files.
 
 Go to the directory with Gramine's PyTorch example::
 
-   git clone --depth 1 --branch v1.5 https://github.com/gramineproject/examples.git
+   git clone --depth 1 --branch v1.8 https://github.com/gramineproject/examples.git
    cd examples/pytorch
 
 The directory contains a Python script ``pytorchexample.py`` and other relevant
@@ -366,7 +374,7 @@ We will use the reference implementation of the Secret Provisioning server found
 under ``CI-Examples/ra-tls-secret-prov`` directory (in the core Gramine
 repository), so let's build the secret provisioning server::
 
-   git clone --depth 1 --branch v1.5 https://github.com/gramineproject/gramine.git
+   git clone --depth 1 --branch v1.8 https://github.com/gramineproject/gramine.git
    cd gramine/CI-Examples/ra-tls-secret-prov
    make app dcap RA_TYPE=dcap