fix: create a new fresh string for comm

comm had the same inner address as the original string which it was
created from (basename). This caused the original underlying bytes to
be preserved and not garbage collected.

Converting it to a byte slice and then back to a string guarantees that
a new string is created releasing the original reference.

pkg/proctree/proctree_feed.go

@@ -228,7 +228,7 @@ func (pt *ProcessTree) FeedFromExec(feed ExecFeed) error {
 
 	execTimestamp := traceetime.NsSinceEpochToTime(feed.TimeStamp)
 	basename := filepath.Base(feed.CmdPath)
-	comm := basename[:min(len(basename), COMM_LEN)]
+	comm := string([]byte(basename[:min(len(basename), COMM_LEN)]))
 	process.GetInfo().SetNameAt(
 		comm,
 		execTimestamp,