Fix wo stack migrate --nginx with wildcard certificate

wo/cli/plugins/stack_migrate.py

@@ -118,7 +118,8 @@ class WOStackMigrateController(CementBaseController):
         for site in allsites:
             if not site:
                 pass
-            if os.path.exists(f'/var/www/{site.sitename}/conf/nginx/ssl.conf'):
+            if (os.path.exists(f'/var/www/{site.sitename}/conf/nginx/ssl.conf') and
+                    not os.path.islink(f'/var/www/{site.sitename}/conf/nginx/ssl.conf')):
                 data = dict(ssl_live_path=WOVar.wo_ssl_live,
                             domain=site.sitename, quic=True)
                 WOTemplate.deploy(

wo/core/variables.py

@@ -15,7 +15,7 @@ class WOVar():
     """Intialization of core variables"""
 
     # WordOps version
-    wo_version = "3.21.0"
+    wo_version = "3.21.1"
     # WordOps packages versions
     wo_adminer = "4.8.1"
     wo_phpmyadmin = "5.2.0"