[ci] [docs] add Oliver to CODEOWNERS (#6247)

.github/CODEOWNERS

@@ -7,4 +7,4 @@
 # offer a reasonable automatic best-guess
 
 # catch-all rule (this only gets matched if no rules below match)
-*    @guolinke @jameslamb @shiyu1994 @jmoralez
+*    @guolinke @jameslamb @shiyu1994 @jmoralez @borchero

docs/FAQ.rst

@@ -11,44 +11,15 @@ LightGBM FAQ
 
 ------
 
-Critical Issues
-===============
+Please post questions, feature requests, and bug reports at https://github.com/microsoft/LightGBM/issues.
 
-A **critical issue** could be a *crash*, *prediction error*, *nonsense output*, or something else requiring immediate attention.
+This project is mostly maintained by volunteers, so please be patient.
+If your request is time-sensitive or more than a month goes by without a response, please tag the maintainers below for help.
 
-Please post such an issue in the `Microsoft/LightGBM repository <https://github.com/microsoft/LightGBM/issues>`__.
-
-You may also ping a member of the core team according to the relevant area of expertise by mentioning them with the arabase (@) symbol:
-
--  `@guolinke <https://github.com/guolinke>`__ **Guolin Ke** (C++ code / R-package / Python-package)
--  `@chivee <https://github.com/chivee>`__ **Qiwei Ye** (C++ code / Python-package)
--  `@shiyu1994 <https://github.com/shiyu1994>`__ **Yu Shi** (C++ code / Python-package)
--  `@tongwu-msft` **Tong Wu** (C++ code / Python-package)
--  `@hzy46 <https://github.com/hzy46>`__ **Zhiyuan He** (C++ code / Python-package)
--  `@btrotta <https://github.com/btrotta>`__ **Belinda Trotta** (C++ code)
--  `@Laurae2 <https://github.com/Laurae2>`__ **Damien Soukhavong** (R-package)
--  `@jameslamb <https://github.com/jameslamb>`__ **James Lamb** (R-package / Dask-package)
--  `@jmoralez <https://github.com/jmoralez>`__ **José Morales** (Dask-package)
--  `@wxchan <https://github.com/wxchan>`__ **Wenxuan Chen** (Python-package)
--  `@henry0312 <https://github.com/henry0312>`__ **Tsukasa Omoto** (Python-package)
--  `@StrikerRUS <https://github.com/StrikerRUS>`__ **Nikita Titov** (Python-package)
--  `@huanzhang12 <https://github.com/huanzhang12>`__ **Huan Zhang** (GPU support)
-
-Please include as much of the following information as possible when submitting a critical issue:
-
--  Is it reproducible on CLI (command line interface), R, and/or Python?
-
--  Is it specific to a wrapper? (R or Python?)
-
--  Is it specific to the compiler? (gcc or Clang version? MinGW or Visual Studio version?)
-
--  Is it specific to your Operating System? (Windows? Linux? macOS?)
-
--  Are you able to reproduce this issue with a simple case?
-
--  Does the issue persist after removing all optimization flags and compiling LightGBM in debug mode?
-
-When submitting issues, please keep in mind that this is largely a volunteer effort, and we may not be available 24/7 to provide support.
+-  `@guolinke <https://github.com/guolinke>`__ **Guolin Ke**
+-  `@shiyu1994 <https://github.com/shiyu1994>`__ **Yu Shi**
+-  `@jameslamb <https://github.com/jameslamb>`__ **James Lamb**
+-  `@jmoralez <https://github.com/jmoralez>`__ **José Morales**
 
 --------------