v1.2.8

Gabs v1.2.8

Diff since v1.2.7

Merged pull requests:

• Bump dawidd6/action-download-artifact from 7 to 8 (#41) (@dependabot[bot])
• fix #43: Validate and add docs for Gaussian states containing symbolic variables (#44) (@Fe-r-oz)

Closed issues:

• Validate and add docs for Gaussian objects containing symbolic variables (#43)