[Bug]: CMake Quickstart: policy CMP0135 is not set.

### Describe the issue

CMake Quickstart:
When building per instructions, after exectuting: cmake -S . -B build

"CMake Warning (dev) at /usr/share/cmake-3.24/Modules/FetchContent.cmake:1267 (message):
The DOWNLOAD_EXTRACT_TIMESTAMP option was not given and policy CMP0135 is
not set. "

### Steps to reproduce the problem

https://github.com/Nickrader/GTestCMakeQuickstart

### What version of GoogleTest are you using?

Latest to fix error.

### What operating system and version are you using?

Lubuntu 22.10

### What compiler and version are you using?

gcc version 12.2.0 (Ubuntu 12.2.0-3ubuntu1)

### What build system are you using?

cmake version 3.24.2

### Additional context

Unsure about implementation of fix.
Simple enough to use latest commit and GIT_REPOSITORY, GIT_TAG.

To use URL it seems setting CMP0135 to NEW would be solution, based on other similar problems/solutions. Unsure where to set, as error didn't point to source code in Googletest.

Start with the CMake Quickstart instructions and the linked GTestCMakeQuickstart reproduction, then run `cmake -S . -B build` to confirm the CMP0135 warning. Review how the quickstart uses FetchContent and whether the URL or GIT_REPOSITORY approach is intended; done means the documented build completes without this policy warning.

Written by the indexing model from the issue text.