Update .github/ISSUE_TEMPLATE/bug_report.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: ymodak

.github/ISSUE_TEMPLATE/bug_report.md

@@ -28,7 +28,7 @@ What actually happened? Include error messages or crash stack traces here.
 
 **Environment Details**
 * **ADK Library Version:** (e.g., 2.0.1)
-* **Desktop OS:** (e.g., macOS, Linux, Windows]
+* **Desktop OS:** (e.g., macOS, Linux, Windows)
 * **Python Version:**
 
 **Model Information**