bump to v3.17.7

[CollinBeczak]

What's Changed

• move bing key to environment variable by @CollinBeczak in move bing key to environment variable #2680
• Fix Task Completelion Modal bug for mobile by @tjayschwarz4 in Fix Task Completelion Modal bug for mobile #2673
• refactor project challenge limit to use environment variable instead of hardcoded value by @CollinBeczak in refactor project challenge limit to use environment variable instead of hardcoded value #2682
• Add UI controls to mark notifications as unread by @CollinBeczak in Add UI controls to mark notifications as unread #2683
• fix unsaveChallenge is not a function is not a function error by @CollinBeczak in fix unsaveChallenge is not a function is not a function error #2684
• Add priority bounds maps to challenge form by @CollinBeczak in Add priority bounds maps to challenge form #2681
• fix bugs in the task analysis and task review tables by @CollinBeczak in fix bugs in the task analysis and task review tables #2685

MR2 Changes

• Update to sbt 1.11.2 and minor readme updates by @ljdelight in Update to sbt 1.11.2 and minor readme updates maproulette-backend#1189
• Add API endpoint to mark notifications as unread by @CollinBeczak in Add API endpoint to mark notifications as unread maproulette-backend#1191
• Add priority bounds to challenge by @CollinBeczak in Add priority bounds to challenge maproulette-backend#1190

Full Changelog: v3.17.6...v3.17.7
Released with maproulette-backend_v4.7.11