test(policy): describe the default refusals without an internal reference

Two test comments named an internal decision for the built-in defaults;
they now describe the rule itself.

Author: kvlonge

crates/sqlquack-policy/src/known_differences/tests/helpers.rs

@@ -11,7 +11,7 @@ const ENDINGS: [(DivergenceFailure, &str); 2] = [
     (DivergenceFailure::Value, VALUE_ENDING),
 ];
 
-/// The known differences the built-in defaults refuse (D806): every other one is allowed.
+/// The known differences the built-in defaults refuse: every other one is allowed.
 const REFUSED_BY_DEFAULT: [&str; 5] = [
     "hash",
     "project_udf",

crates/sqlquack-policy/src/known_differences/tests/test_known_differences.rs

@@ -50,7 +50,7 @@ fn given_the_repository_policy_when_checking_the_known_differences_then_each_mat
             expected_findings: &[],
         },
         EntryCheckTestCase {
-            description: "the evidence file refuses by default exactly the differences D806 refuses",
+            description: "the evidence file refuses by default exactly the differences the default rule refuses",
             findings: defaults_unlike_the_rule,
             expected_findings: &[],
         },