Update unreleased changes to be in past tense

doc/changes/unreleased.md

@@ -2,20 +2,20 @@
 
 ## ✨Features
 
-* Add support for multiversion documentation
-* Add support for all standard nox tasks provided by `exasol-toolbox`
+* Added support for multi-version documentation
+* Added support for all standard nox tasks provided by `exasol-toolbox`
 
 ## ⚒️ Refactorings
 
-* Reformat entire code base with `black` and `isort`
+* Reformated entire code base with `black` and `isort`
 
 ## 🔩 Internal
 
-* Relock dependencies
-* Add exasol-toolbox workflows and actions
-* Add missing plugin for multiversion documentation
-* Add support for publishing documentation to gh pages
-* Add `.git-blame-ignore-revs` file to workspace
+* Relocked dependencies
+* Added exasol-toolbox workflows and actions
+* Added missing plugin for multi-version documentation
+* Added support for publishing documentation to gh pages
+* Added `.git-blame-ignore-revs` file to workspace
 
     Note: please make sure to adjust yor git config accordingly (if not done yet)