docs/devel/qapi-code-gen: Normalize version refs x.y.0 to just x.y

Missed in commit 9bc6e893b72 (qapi: Normalize version references x.y.0
to just x.y).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20240205074709.3613229-2-armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

docs/devel/qapi-code-gen.rst

@@ -1023,7 +1023,7 @@ For example::
  #
  # ... more members ...
  #
- # Since: 0.14.0
+ # Since: 0.14
  ##
  { 'struct': 'BlockStats',
    'data': {'*device': 'str', '*node-name': 'str',
@@ -1039,7 +1039,7 @@ For example::
  #
  # Returns: A list of @BlockStats for each virtual block devices.
  #
- # Since: 0.14.0
+ # Since: 0.14
  #
  # Example:
  #