Release 5.2.0

What's Changed

• chore: bump COG version for schema 5.2 by @nayib-jose-gloria in #1004
• feat: use isoform lengths median to determine gene feature_length + write feature_length for 'spike-in' features in var by @nayib-jose-gloria in #1005
• feat: add feature_type to var df during add labels step by @nayib-jose-gloria in #1006
• feat: update suspension_type mapping by @nayib-jose-gloria in #1007
• feat: update development stage ontology term ID validation rules by @nayib-jose-gloria in #1009
• chore: create GH Page with "latest-schema.html" redirect to latest schema version doc by @nayib-jose-gloria in #1026
• AUTO: update migrate.py by @github-actions in #1011

Full Changelog: v5.1.1...v5.2.0