ci: drop redundant versioningTool input (MinVer is now unconditional)

The shared workflows no longer accept versioningTool; MinVer always runs. The
minverMinimumMajorMinor floor still applies.

Author: glennawatson

.github/workflows/release.yml

@@ -23,7 +23,6 @@ jobs:
     with:
       solutionFile: ReactiveUI.SourceGenerators.slnx
       installWorkloads: true
-      versioningTool: minver
       minverMinimumMajorMinor: '2.7'
       bump: ${{ inputs.bump }}
     secrets: