ADD: added CWE reference

software-bugs.bib

@@ -17,3 +17,10 @@
 	year = "2020",
 	institution = "Forescout Research Labs"
 }
+
+@misc{cwe2021,
+	title = "CWE Top 25 Most Dangerous Software Weaknesses",
+	year = "2021",
+	howpublished = "\url{https://cwe.mitre.org/top25/archive/2021/2021_cwe_top25.html}",
+	month = "July~" # "26--26"
+}