Integrate code review remarks

Author: HHobeck

src/GitVersion.Core/VersionCalculation/TrunkBased/NonTrunk/FirstCommitOnRelease.cs

@@ -2,6 +2,11 @@
 
 namespace GitVersion.VersionCalculation.TrunkBased.NonTrunk;
 
+/// <summary>
+/// This incrementer identifies the first commit on a branch marked with IsReleaseBranch true and appends the version number for
+/// instance 1.0.0 (extracted from the branch name) as an alternative semantic version to the context. This information will be
+/// used later to bump the version number to a higher value if necessary.
+/// </summary>
 internal sealed class FirstCommitOnRelease : ITrunkBasedIncrementer
 {
     // B  57 minutes ago  (HEAD -> release/1.0.0)