Change cmake to use SQLite3::SQLite3

[jordan-evens]

Currrently only getting a warning with some builds

CMake Warning (dev) at src/cpp/fs/CMakeLists.txt:36 (target_link_libraries):
  The library that is being linked to, SQLite::SQLite3, is marked as being
  deprecated by the owner.  The message provided by the developer is:

  The target name SQLite::SQLite3 is deprecated.  Please use SQLite3::SQLite3
  instead.

Need to change to SQLite3::SQLite3 but doing so right now breaks builds where that deprecation isn't present yet.