flake: `TestWorkspaceAutobuild/RequireActiveVersion`

[ethanndickson]

https://github.com/coder/coder/actions/runs/12365872187/job/34512044417

     workspaces_test.go:1104: 
        	Error Trace:	C:/a/coder/coder/enterprise/coderd/workspaces_test.go:1104
        	Error:      	"map[]" should have 1 item(s), but has 0
        	Test:       	TestWorkspaceAutobuild/RequireActiveVersion

[ethanndickson]

Feel free to reassign if you don't think this is related to the recent Autobuild changes.

[johnstcn]

Seen here: https://github.com/coder/coder/actions/runs/12988345475/job/36219133862