Duplicated name FOO in error report when exporting foo, Foo, FOO

**Describe the bug**
Duplicated name `FOO` when exporting `foo`, `Foo`, `FOO`

**To Reproduce**

      FOO←Foo←foo←{⍵ ⍵}

      ]create # \t\foo

ERRORS ENCOUNTERED: ⎕SE.Link.Create: File name case clash - try using caseCode←1:

#.FOO

#.Foo

#.FOO

#.foo

**Expected behaviour**
One of each name.

**Desktop (please complete the following information):**
- OS: Windows 11 (10.0.26200) 64-bit
- APL version: 20.0.53342 64-bit Unicode
- `⎕SE.Link.Version`: 4.2.2

Start by reproducing the Windows case-clash report with the ]create command shown in the issue and inspect the ⎕SE.Link.Create error output. Compare the current entries for foo, Foo, and FOO with the expected report containing one of each name.

Written by the indexing model from the issue text.