fix(deps): update dependency @astrojs/sitemap to v3.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@astrojs/sitemap (source)	3.3.1 -> 3.4.0

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Release Notes

withastro/astro (@​astrojs/sitemap)

v3.4.0

Compare Source

Minor Changes

• #​13753 90293de Thanks @​mattyoho! - Customize the filenames of sitemap XML files generated by the @astro/sitemap integration by setting filenameBase in the integration configuration settings. This may be useful when deploying an Astro site at a path on a domain with preexisting sitemap files.

  Generated sitemap files will appear at /sitemap-0.xml and /sitemap-index.xml by default, which may conflict with preexisting files. Set filenameBase to a custom value to avoid that if so:

  import { defineConfig } from 'astro/config';
  import sitemap from '@​astrojs/sitemap';
  
  export default defineConfig({
    site: 'https://example.com',
    integrations: [
      sitemap({
        filenameBase: 'astronomy-sitemap',
      }),
    ],
  });

  This will yield sitemap and index files as https://example.com/astronomy-sitemap-0.xml and https://example.com/astronomy-sitemap-index.xml.

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