chore(jsonnet-lint): Make promtail-mixin depends on loki-mixin `m…

…ain` version

We had to change it to some older version to revert this PR
#6377

Issue, context and long-term fix are explained in this
#6378

Signed-off-by: Kaviraj <kavirajkanagaraj@gmail.com>

production/promtail-mixin/jsonnetfile.json

@@ -26,7 +26,7 @@
           "subdir": "production/loki-mixin"
         }
       },
-      "version": "aed11c25e"
+      "version": "main"
     }
   ],
   "legacyImports": true