Update deskutils/semantik to 1.2.1

This is a minor bugfix release. From the changelog:

• Fix duplicate reference values
• Fix double prompts for overwriting files
• Fix map variables visibility when opening maps
• Fix document generator dialog's tab navigation
• Fix boundary objects' text alignment (diagrams)
• Fix pipe objects' resizing (diagrams)
• Fix component objects' margin sizes
• Enable newlines on most diagram objects #89
• Add global settings for commands to execute after a template is called