[vz-dev] [volkszaehler/vzlogger] d375e5: Fix gtest version

[maxberger]

  Branch: refs/heads/master
  Home:   https://github.com/volkszaehler/vzlogger
  Commit: d375e53ead99d34f8fed7d336324652e9d7427c0
      https://github.com/volkszaehler/vzlogger/commit/d375e53ead99d34f8fed7d336324652e9d7427c0
  Author: Max Berger <max at berger.name>
  Date:   2023-01-02 (Mon, 02 Jan 2023)

  Changed paths:
    M gtest/CMakeLists.txt.in

  Log Message:
  -----------
  Fix gtest version

Using the latest released gtest version works. The current main version
has a bug which causes it to fail on most compilers. This fixes gtest to
a given version, thus avoiding random failures