docs: fix incorrect text in some of the indexes

Author: georgeRobertson

docs/advanced_guidance/package_documentation/business_rules/index.md

@@ -26,6 +26,6 @@ title: Business Rules Documentation
 
     ---
 
-    [:octicons-arrow-right-24: Read about the `Submission Feedback` objects here](udfs.md)
+    [:octicons-arrow-right-24: Read about the `UDFs` objects here](udfs.md)
 
 </div>

docs/advanced_guidance/package_documentation/data_contract/index.md

@@ -8,13 +8,13 @@ title: Data Contract Documentation
 
     ---
 
-    [:octicons-arrow-right-24: Read about the `Operation` objects here](readers.md)
+    [:octicons-arrow-right-24: Read about the `Readers` objects here](readers.md)
 
 -   :material-language-python:{ .lg .middle } __Domain Types__
 
     ---
 
-    [:octicons-arrow-right-24: Read about the `Business Rules` objects here](domain_types.md)
+    [:octicons-arrow-right-24: Read about the `Domain Types` objects here](domain_types.md)
 
 
 </div>