YAML item proviuder: fix method isVersionSupported (#4820)

Required after the merge of PR #4807 and PR #4776

Signed-off-by: Laurent Garnier <lg.hc@free.fr>

Author: lolodomo

bundles/org.openhab.core.model.yaml/src/main/java/org/openhab/core/model/yaml/internal/items/YamlItemProvider.java

@@ -89,7 +89,7 @@ public Class<YamlItemDTO> getElementClass() {
 
     @Override
     public boolean isVersionSupported(int version) {
-        return version >= 2;
+        return version >= 1;
     }
 
     @Override