Attest: Extend the naming of token encoding related functionality

Emphasize the token encoding related functionality with
extending the name of relevant functions and structures
with the 'encode' word.

Change-Id: I96683c4be7fd3e6d8c79c131d93f58cfc57470c7
Signed-off-by: Laurence Lundblade <lgl@securitytheory.com>
Signed-off-by: Tamas Ban <tamas.ban@arm.com>
diff --git a/docs/reference/services/tfm_attestation_integration_guide.rst b/docs/reference/services/tfm_attestation_integration_guide.rst
index 5d29861..2a2f483 100644
--- a/docs/reference/services/tfm_attestation_integration_guide.rst
+++ b/docs/reference/services/tfm_attestation_integration_guide.rst
@@ -174,7 +174,7 @@
 - Initial Attestation Service:
     - ``attestation_core.c`` : Implements core functionalities such as
       implementation of APIs, retrieval of claims and token creation.
-    - ``attest_token.c``: Implements the token creation function such as
+    - ``attest_token_encode.c``: Implements the token creation functions such as
       start and finish token creation and adding claims to the token.
     - ``attestation_key.c``: Get the asymmetric attestation key from platform
       layer and register it to the TF-M Crypto service for further usage.