small fix

[Cedar17]

This pull request includes several updates and improvements to the ZlibValidation project. The most important changes include updating the project version, fixing a logging comment, adding new test commands, and modifying a function to handle absolute values for differences.

Version updates:

• Updated project version from 1.1.0 to 1.1.1 in CMakeLists.txt and include/version.h. [1] [2]

Documentation improvements:

• Added a new entry in doc/ChangeLog.md to reflect the recent changes, including the version update and new test commands.

Code improvements:

• Fixed the logging level comment in printInfo() function in src/LibFileOperations.cpp to correctly indicate TRACE instead of DEBUG.
• Modified the generateReport function in src/LibraryComparator.cpp to use absolute values for maximum differences.

Testing enhancements:

• Added new test commands for the mono, supercell, compare, and func subcommands in test/test.sh. [1] [2]