Fix AI prompt footer formatting in commit message template

**Generated by CodeLite**

Signed-off-by: Eran Ifrah <eran@codelite.org>

Author: eranif

Plugin/ai/Prompts.cpp

@@ -48,7 +48,7 @@ const std::string PROMPT_GIT_COMMIT_MSG =
   * Summarize **what** was changed (high‑level overview, not a line‑by‑line description).
 * If the change touches multiple logical areas, add a short **"* <area>"** bullet list at the end of the body.
 * Do **not** repeat the diff verbatim in the commit message; use it only as source material for understanding the change.
-* Append a footer with the following text at the end of the generated commit message: "**Generated by CodeLite**"
+* Append a footer with the following BOLD text at the end of the generated commit message: "Generated by CodeLite"
 
 ## Input
 Below is the `git diff` of the change you need to describe. Use it to infer the intent of the change, the files involved,