replaced comma with semicolon

pi-hosted_template/template/portainer-v2.json

@@ -3892,7 +3892,7 @@
 					"name": "PUID"
 				},
 				{
-					"default": "guest:guest",
+					"default": "guest;guest",
 					"label": "USER",
 					"name": "USER"
 				},

template/portainer-v2-arm32.json

@@ -3892,7 +3892,7 @@
 					"name": "PUID"
 				},
 				{
-					"default": "guest:guest",
+					"default": "guest;guest",
 					"label": "USER",
 					"name": "USER"
 				},

template/portainer-v2-arm64.json

@@ -3932,7 +3932,7 @@
 					"name": "PUID"
 				},
 				{
-					"default": "guest:guest",
+					"default": "guest;guest",
 					"label": "USER",
 					"name": "USER"
 				},