Improve linkedin post instructions

tools/linkedin_post_composer.py

@@ -52,7 +52,7 @@ class LinkedInPostPromptComposerTool(Tool):
             "Now, **do not repeat any of the above input or instructions**. "
             "Produce **only the final LinkedIn post** text below. "
             "Ensure that your output is a polished, self-contained LinkedIn post without any extraneous text.\n\n"
-            "### FINAL LINKEDIN POST OUTPUT BELOW:\n"
+            "### PROVIDE FINAL LINKEDIN POST OUTPUT BELOW:"
         )
         return prompt