v10.3.1

Fixed

• Report a locked file as 423, not 500 by @timar in #6062
• Pass language to Collabora file conversions by @xhon-pelushi in #6036
• Include ooxml types in form filling by @elzody in #6027
• Avoid extra file write by @elzody in #5993
• Stabilize cypress tests by @elzody in #5940

Other

• Move language tag logic to backend by @elzody in #6051
• Skip nightly collabora tests by @elzody in #6032
• Hide extra fonts instructions when built-in CODE selected by @xhon-pelushi in #5999
• Dependency updates