Update the reported library version for 6.0.1.

**Explanation:** Update the reported library version for 6.0.1.
**Scope:** 6.0.1
**Issue:** N/A
**Original PR:** N/A
**Risk:** None
**Testing:** N/A (normal CI)
**Reviewer:** @briancroom

Author: grynspan

cmake/modules/LibraryVersion.cmake

@@ -8,7 +8,7 @@
 
 # The current version of the Swift Testing release. For release branches,
 # remember to remove -dev.
-set(SWT_TESTING_LIBRARY_VERSION "6.0")
+set(SWT_TESTING_LIBRARY_VERSION "6.0.1")
 
 find_package(Git QUIET)
 if(Git_FOUND)