Bump versions and update release notes

Remove Dependabot from release/5.x; no longer necessary

Bump version numbers and update release notes

Fix uncaught code analysis warnings causing a build break

Default to excluding ad hoc model substitution (more common)

Update package references

Revert CA suppression; required for .NET 6 SDK

Use 404 vs 400 when versioning only by URL and no requested versions. F…

…ixes #911

Fix GitHub release link generation for prereleases

Bump version and release notes