v12.0.0-beta.2

Fixed

• Report a locked file as 423, not 500 by @timar in #6064
• Pass language to Collabora file conversions by @xhon-pelushi in #6038
• Include ooxml types in form filling by @elzody in #6029
• Avoid extra file write by @elzody in #5971

Other

• Move language tag logic to backend by @elzody in #6053
• Pin workflows to stable35 by @elzody in #6056
• Skip nightly collabora tests by @elzody in #6030
• Hide extra fonts instructions when built-in CODE selected by @xhon-pelushi in #6001
• Use only nightly collabora image by @elzody in #5894
• Trigger direct editing Save As via postMessage by @elzody in #5982
• Dependency updates