Rename files after store entry -> store object rename

doc/manual/src/SUMMARY.md.in

@@ -18,10 +18,10 @@
 - [Design and Data Model](design/design.md)
   - [Overview](design/overview.md)
   - [The Store Layer](design/store/store.md)
-    - [Store Objects](design/store/entries.md)
+    - [Store Objects](design/store/objects.md)
     - [Store Paths](design/store/paths.md)
     - [Nix Archives](design/store/nar.md)
-    - [Content-Addressing Store Objects](design/store/entry-ca.md)
+    - [Content-Addressing Store Objects](design/store/object-ca.md)
     - [Derivations](design/store/drvs/drvs.md)
       - [Input-Addressing](design/store/drvs/ia.md)
       - [Content-Addressing (Experimental)](design/store/drvs/ca.md)

doc/manual/src/design/store/building.md

@@ -2,7 +2,7 @@
 
 ## Scanning for references
 
-Before in the section on [store objects](../entries.md), we talked abstractly about scanning for references.
+Before in the section on [store objects](../objects.md), we talked abstractly about scanning for references.
 Now we can make this concrete.
 
 After the derivation's command is run, Nix needs to process the "raw" output directories to turn them into legit store objects.