Update README.md

Author: danielsiegl

.github/README.md

@@ -7,7 +7,7 @@ To claim a trial or buy a license contact welcome@lieberlieber.com
 
       # download Lemontree.Automation on a runner and setup the license
       - name: GetLTA
-        uses: LieberLieber/setup-LemonTree.Automation@v4
+        uses: LieberLieber/setup-LemonTree.Automation@v6
         id: GetLTA
         with:
           License: ${{secrets.LTALICENSE}}