CTestCustom: Suppress Windows manifest unrecognized element warning

Our `cmake.version.manifest` file uses a "compatibility" element for
Windows 10 support.  Older MS tools warn about it being unknown, so
suppress the warning.

CTestCustom.cmake.in

@@ -53,7 +53,7 @@ list(APPEND CTEST_CUSTOM_WARNING_EXCEPTION
   "[Qq]t([Cc]ore|[Gg]ui|[Ww]idgets).*warning.*conversion.*may alter its value"
   "warning:.*is.*very unsafe.*consider using.*"
   "warning:.*is.*misused, please use.*"
-  "CMakeSetupManifest.xml.*manifest authoring warning.*Unrecognized Element"
+  "cmake.version.manifest.*manifest authoring warning.*Unrecognized Element"
   "cc-3968 CC: WARNING File.*" # "implicit" truncation by static_cast
   "ld: warning: directory not found for option .-(F|L)"
   "ld: warning .*/libgcc.a archive's cputype"