Bumping to 2.121.1 because required by workflow-step-api baseline
Bumping to 2.121.1 because required by workflow-step-api baseline

```
Caused by: java.io.IOException: Pipeline: Step API v2.19 failed to load.
 - You must update Jenkins from v2.107.3 to v2.121.1 or later to run this plugin.
        at hudson.PluginWrapper.resolvePluginDependencies(PluginWrapper.java:655)
```

martinda/git-plugin,jenkinsci/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,MarkEWaite/git-plugin,MarkEWaite/git-plugin,jenkinsci/git-plugin,martinda/git-plugin,v1v/git-plugin,v1v/git-plugin,MarkEWaite/git-plugin,v1v/git-plugin,martinda/git-plugin