Documentation: Move Gerrit Guidelines to "Contributing" section

The Gerrit Guidelines are related to the contributing process and also
contain documentation which goes beyond "Getting started". Thus, move
them to the "Contributing" section.

Change-Id: I775a79c14562a1f4a9563012aee3b690c0635cc1
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62386
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/Documentation/getting_started/gerrit_guidelines.md b/Documentation/contributing/gerrit_guidelines.md
similarity index 100%
rename from Documentation/getting_started/gerrit_guidelines.md
rename to Documentation/contributing/gerrit_guidelines.md
diff --git a/Documentation/contributing/index.md b/Documentation/contributing/index.md
index f9db1bc..61a8ca6 100644
--- a/Documentation/contributing/index.md
+++ b/Documentation/contributing/index.md
@@ -1,6 +1,7 @@
 # Contributing
 
 * [Coding Style](coding_style.md)
+* [Gerrit Guidelines](gerrit_guidelines.md)
 * [Project Ideas](project_ideas.md)
 * [Documentation Ideas](documentation_ideas.md)
 * [Google Summer of Code](gsoc.md)
diff --git a/Documentation/getting_started/index.md b/Documentation/getting_started/index.md
index 9b9ac7f..3cfea1e 100644
--- a/Documentation/getting_started/index.md
+++ b/Documentation/getting_started/index.md
@@ -4,7 +4,6 @@
 * [Build System](build_system.md)
 * [Submodules](submodules.md)
 * [Kconfig](kconfig.md)
-* [Gerrit Guidelines](gerrit_guidelines.md)
 * [Documentation License](license.md)
 * [Writing Documentation](writing_documentation.md)
 * [Setting up GPIOs](gpio.md)