Allow ibexa/http-cache 4.4 to be in line with other ibexa dependencies

Author: emodric

composer.json

@@ -24,7 +24,7 @@
         "ibexa/rest": "^4.4",
         "ibexa/content-forms": "^4.4",
         "ibexa/solr": "^4.4",
-        "ibexa/http-cache": "^4.6",
+        "ibexa/http-cache": "^4.4",
         "lolautruche/ez-core-extra-bundle": "^4.0",
         "symfony/translation-contracts": "^2.5 || ^3.0",
         "pagerfanta/pagerfanta": "^2.7 || ^3.5",