🌱 bump pygments from 2.20.0 to 2.21.0 - #2896

Changed pages include:

• api-reference/catalogd-webserver/index.html - view
• concepts/controlling-catalog-selection/index.html - view
• concepts/crd-upgrade-safety/index.html - view
• concepts/single-owner-objects/index.html - view
• concepts/upgrade-support/index.html - view
• concepts/version-ranges/index.html - view
• contribute/developer/index.html - view
• getting-started/olmv1_getting_started/index.html - view
• howto/catalog-queries/index.html - view
• howto/how-to-channel-based-upgrades/index.html - view

There are more changes not included in the list