docs: Fix typos etc

Fix trivial typos, spaces, indentations and other bits in the
documentation.

Signed-off-by: Nicola Mazzucato <nicola.mazzucato@arm.com>
Change-Id: I4aa6ef65a6caeb73862904033fb29e55dee69f2a
diff --git a/docs/design_docs/software/index.rst b/docs/design_docs/software/index.rst
index 45240ed..cc00ba8 100644
--- a/docs/design_docs/software/index.rst
+++ b/docs/design_docs/software/index.rst
@@ -9,8 +9,8 @@
     Hardware Abstraction Layer <hardware_abstraction_layer.rst>
     Cooperative Scheduling     <tfm_cooperative_scheduling_rules.rst>
     Code Templates             <tfm_code_generation_with_jinja2.rst>
-    Implicit Typecasintg       <enum_implicit_casting.rst>
+    Implicit Typecasting       <enum_implicit_casting.rst>
 
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-*Copyright (c) 2023, Arm Limited. All rights reserved.*
+*Copyright (c) 2023-2024, Arm Limited. All rights reserved.*