Bump torch from 1.13.1+cpu to 2.2.0 in /docs (#935)

Bumps [torch](https://github.com/pytorch/pytorch) from 1.13.1+cpu to
2.2.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pytorch/pytorch/releases">torch's
releases</a>.</em></p>
<blockquote>
<h2>PyTorch 2.2: FlashAttention-v2, AOTInductor</h2>
<h1>PyTorch 2.2 Release Notes</h1>
<ul>
<li>Highlights</li>
<li>Backwards Incompatible Changes</li>
<li>Deprecations</li>
<li>New Features</li>
<li>Improvements</li>
<li>Bug fixes</li>
<li>Performance</li>
<li>Documentation</li>
</ul>
<h1>Highlights</h1>
<p>We are excited to announce the release of PyTorch® 2.2! PyTorch 2.2
offers ~2x performance improvements to
<code>scaled_dot_product_attention</code> via FlashAttention-v2
integration, as well as AOTInductor, a new ahead-of-time compilation and
deployment tool built for non-python server-side deployments.</p>
<p>This release also includes improved torch.compile support for
Optimizers, a number of new inductor optimizations, and a new logging
mechanism called TORCH_LOGS.</p>
<p><strong>Please note that we are <a
href="https://redirect.github.com/pytorch/pytorch/issues/114602">deprecating
macOS x86 support</a>, and PyTorch 2.2.x will be the last version that
supports macOS x64.</strong></p>
<p>Along with 2.2, we are also releasing a series of updates to the
PyTorch domain libraries. More details can be found in the library
updates blog.</p>
<p>This release is composed of 3,628 commits and 521 contributors since
PyTorch 2.1. We want to sincerely thank our dedicated community for your
contributions. As always, we encourage you to try these out and report
any issues as we improve 2.2. More information about how to get started
with the PyTorch 2-series can be found at our <a
href="https://pytorch.org/get-started/pytorch-2.0/">Getting Started</a>
page.</p>
<p>Summary:</p>
<ul>
<li><code>scaled_dot_product_attention</code> (SDPA) now supports
FlashAttention-2, yielding around 2x speedups compared to previous
versions.</li>
<li>PyTorch 2.2 introduces a new ahead-of-time extension of
TorchInductor called AOTInductor, designed to compile and deploy PyTorch
programs for non-python server-side.</li>
<li><code>torch.distributed</code> supports a new abstraction for
initializing and representing ProcessGroups called device_mesh.</li>
<li>PyTorch 2.2 ships a standardized, configurable logging mechanism
called TORCH_LOGS.</li>
<li>A number of torch.compile improvements are included in PyTorch 2.2,
including improved support for compiling Optimizers and improved
TorchInductor fusion and layout optimizations.</li>
<li>Please note that we are deprecating macOS x86 support, and PyTorch
2.2.x will be the last version that supports macOS x64.</li>
<li><code>torch.ao.quantization</code> now offers a prototype
<code>torch.export</code> based flow</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/pytorch/pytorch/commits/v2.2.0">compare
view</a></li>
</ul>
</details>
<br />


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Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: xiang song(charlie.song) <[email protected]>

docs/requirements.txt

@@ -2,7 +2,6 @@ sphinx==7.1.2
 sphinx-rtd-theme==1.3.0
 nbsphinx
 pandoc
---extra-index-url https://download.pytorch.org/whl/cpu
-torch==1.13.1+cpu
+torch>=2.2.0
 -f https://data.dgl.ai/wheels-internal/repo.html
-dgl==1.0.4
+dgl==1.0.4