Add data-nosnippet to cookie banner in 2.11 docs

[svekars]

• Google is indexing the red X close-button image (pytorch-x.svg) from the cookie consent banner and showing it as the page thumbnail in search
  results.
  • Added data-nosnippet attribute to the
    element across all 2,820 HTML files in the 2.11/ directory.
  • This tells Google not to use any content within the cookie banner (including the close button image) for search snippets or thumbnails, so it will
    select more relevant page content instead.

Details

Simple string replacement in every .html file:

 - <div class="cookie-banner-wrapper">                                                                                                               
 + <div class="cookie-banner-wrapper" data-nosnippet>             

No impact on indexing, ranking, or page functionality — data-nosnippet only controls what appears in search result previews.

Test plan

• Verified all 2,820 HTML files in 2.11/ were updated
• Confirmed no files were missed
• Spot-check rendered pages to confirm cookie banner still functions normally