[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at cde7d90 Revert "[OPENMP]Fix PR47621: Variable used by task inside a template function is not made firstprivate by default"
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   cde7d90..9eba6b2  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 9eba6b20a0579d3441e1b0f3cb3942f86d32679f.
CMake Error at CMakeLists.txt:3 (cmake_minimum_required):
  CMake 3.13.4 or higher is required.  You are running version 3.7.1


-- Configuring incomplete, errors occurred!