Rename test to clear up confusion

tests/DfE.FindInformationAcademiesTrusts.UnitTests/Pages/Trusts/Overview/TrustDetailsModelTests.cs

@@ -152,7 +152,7 @@ public async Task OnGetAsync_should_configure_TrustPageMetadata()
     }
 
     [Fact]
-    public void SharepointLink_should_have_correct_default_value()
+    public void SharepointLink_should_be_empty_string_by_default()
     {
         _sut.SharepointLink.Should().Be("");
     }