[TASK] Update Guides

objects.inv is available now. objects.inv.json does not contain null anymore but string "-" as does sphinx

Author: linawolf

composer.lock

@@ -1,16 +1,16 @@
 {
     "std:doc": {
         "index": [
-            null,
-            null,
+            "-",
+            "-",
             "index.html",
             "Document Title"
         ]
     },
     "std:label": {
         "document-title": [
-            null,
-            null,
+            "-",
+            "-",
             "index.html#document-title",
             "Document Title"
         ]