Recently created tag breaks CMake

[s-barannikov]

CMake output:

-- Found Git: /usr/bin/git (found version "2.20.1") 
CMake Error at CMakeLists.txt:48 (list):
  list GET given empty list

CMake Error at CMakeLists.txt:49 (list):
  list GET given empty list

CMake Error at CMakeLists.txt:50 (list):
  list GET given empty list

-- NGRAPH_VERSION nbench_db+1eda135
-- NGRAPH_VERSION_SHORT 
-- NGRAPH_WHEEL_VERSION 
-- NGRAPH_API_VERSION 

The cause is a tag with unconventional name nbench_db.

[s-barannikov]

Fixed by #3300.