Update dependency SIL.ReleaseTasks to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
SIL.ReleaseTasks	2.5.0 → 3.2.0

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Release Notes

sillsdev/SIL.BuildTasks (SIL.ReleaseTasks)

v3.1.1

Changed

• [SIL.BuildTasks] Upgraded dependency on Markdig.Signed to version 0.37.0 (to be consistent with SIL.ReleaseTasks)

v3.1.0

Added

• [SIL.ReleaseTasks] Added code to CreateReleaseNotesHtml to set the charset
  in a metadata element in the HTML head so that special characters such
  as the TM mark do not render as garbled text (#​72)

v3.0.0

Added

• [SIL.ReleaseTasks] Added filter option for project-specific entries (#​48)
• [SIL.BuildTasks] Additionally build for .NetStandard 2.0

Changed

• Target .NET 4.7.2 instead of 4.6.1
• SIL International changed to SIL Global
• BREAKING DEPENDENCY CHANGE: Upgraded to NUnit 4 (see https://docs.nunit.org/articles/nunit/release-notes/breaking-changes.html)

Fixed

• [SIL.ReleaseTasks] Exclude links from CHANGELOG.md file when extracting release notes (#​46)
• [SIL.BuildTasks] Fixed logging in MakeWixForDirTree task (#​55)
• [SIL.BuildTasks] Improved FileUpdate replacement verification and error handling (#​63)

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