Merge branch 'nd/fix-direct-answer-response' into 'master'

Fix DirectAnwer response from the chat

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/127897



Merged-by: Jan Provaznik <jprovaznik@gitlab.com>
Approved-by: Jan Provaznik <jprovaznik@gitlab.com>
Approved-by: Gosia Ksionek <mksionek@gitlab.com>
Reviewed-by: Nicolas Dular <ndular@gitlab.com>
Co-authored-by: Nicolas Dular <ndular@gitlab.com>

ee/lib/gitlab/llm/chain/agents/zero_shot/executor.rb

@@ -130,7 +130,7 @@ def conversation
                 Thought: you should always think about what to do
                 Action: the action to take, should be one tool from this list or an direct answer (then use DirectAnswer as action): [%<tool_names>s]
                 Action Input: the input to the action needs to be provided for every action that uses a tool
-                Observation: the result of the actions. If the Action is DirectAnswer never write an Observation!
+                Observation: the result of the actions. If the Action is DirectAnswer never write an Observation, but remember that you're still #{AGENT_NAME}.
 
                 ... (this Thought/Action/Action Input/Observation sequence can repeat N times)
 
@@ -139,7 +139,7 @@ def conversation
 
                 When concluding your response, provide the final answer as "Final Answer:" as soon as the answer is recognized.
 
-                If no tool is needed, give a final answer with "Final Answer: DirectAnswer" for the Action parameter and skip writing an Observation.
+                If no tool is needed, give a final answer with "Action: DirectAnswer" for the Action parameter and skip writing an Observation.
                 Begin!
               PROMPT
               ),