fix: use correct package name

cmd/muxt/generate.go

@@ -96,7 +96,7 @@ func generateCommand(args []string, workingDirectory string, getEnv func(string)
 		g.Package = packageList[i]
 	} else if len(packageList) > 0 {
 		g.Package = packageList[0]
-		g.goPackage = packageList[0].ID
+		g.goPackage = packageList[0].Name
 	}
 	ts, err := source.Templates(workingDirectory, g.templatesVariable, g.Package)
 	if err != nil {

cmd/muxt/testdata/generate/package.txtar

@@ -0,0 +1,30 @@
+
+cd package
+muxt generate
+
+exec go build
+
+-- package/go.mod --
+module pack
+
+go 1.18
+
+-- package/main.go --
+package main
+
+import (
+	"embed"
+	"html/template"
+)
+
+var (
+	//go:embed *.gohtml
+	templateFiles embed.FS
+
+	templates = template.Must(template.ParseFS(templateFiles, "*"))
+)
+
+func main() {}
+
+-- package/index.gohtml --
+<h1>hello</h1>