Merge changes from topic "fix_checkpatch_merges" into integration

* changes:
  fix(plat/st): remove double space
  fix(checkpatch): do not check merge commits
diff --git a/docs/getting_started/prerequisites.rst b/docs/getting_started/prerequisites.rst
index aa1ae67..f45193a 100644
--- a/docs/getting_started/prerequisites.rst
+++ b/docs/getting_started/prerequisites.rst
@@ -26,7 +26,7 @@
 |TF-A| can be built with any of the following *cross-compiler* toolchains that
 target the Armv7-A or Armv8-A architectures:
 
-- GCC >= 10.2-2020.11 (from the `Arm Developer website`_)
+- GCC >= 10.3-2021.07 (from the `Arm Developer website`_)
 - Clang >= 4.0
 - Arm Compiler >= 6.0