Update coreexttest.fth history

Author: gerryjackson

src/coreexttest.fth

@@ -11,7 +11,8 @@
 \ The tests are not claimed to be comprehensive or correct 
 
 \ ------------------------------------------------------------------------------
-\ Version 0.14 21 July 2022 Updated first line of BUFFER: test as recommended
+\ Version 0.15 1 August 2025 Added two tests to VALUE
+\         0.14 21 July 2022 Updated first line of BUFFER: test as recommended
 \              in issue 32
 \         0.13 28 October 2015
 \              Replace <FALSE> and <TRUE> with FALSE and TRUE to avoid