Adding dunfell to compatible layers

After switching to Dunfell (latest stable Poky version)
it needs to be included in compatible layers

Signed-off-by: Robert Drab <robert.drab@huawei.com>

meta-ohos-foundation/conf/layer.conf

@@ -10,4 +10,4 @@ BBFILE_PATTERN_ohos-foundation = "^${LAYERDIR}/"
 BBFILE_PRIORITY_ohos-foundation = "6"
 
 LAYERDEPENDS_ohos-foundation = "core"
-LAYERSERIES_COMPAT_ohos-foundation = "gatesgarth"
+LAYERSERIES_COMPAT_ohos-foundation = "dunfell gatesgarth"