app: v1.7.7

Summary

• Fixes viewing submission files
• Fixes loading of calendar events that could happen for old events.

What's Changed

• Upgrade Sharezone to v1.7.7 by @nilsreichardt in #1037
• Add signing steps to sz deploy macos command by @nilsreichardt in #1029
• Add sz deploy macos command to stable.yml, beta.yml and alpha.yml by @nilsreichardt in #1034
• Fix viewing submission files by @nilsreichardt in #1036
• Fix typo "Termin-vereinbarung" on support page by @nilsreichardt in #1035
• Use SystemMouseCursors.click for file card on submission page by @nilsreichardt in #1039
• Set build number to 0 since the build number is managed by our CD pipeline. by @nilsreichardt in #1038
• Upgrade Fastlane to 2.216.0 and add retries for uploading to Google Play Store by @nilsreichardt in #1041
• Fix latestEditor in CalendricalEvent can be null by @nilsreichardt in #1043

Full Changelog: app-v1.7.6...app-v1.7.7