Fix bash syntax error caused by apostrophe in awk comment

The comment "it's too old" contained an apostrophe (single quote) which
broke the bash single-quote enclosure of the awk script, causing:
  "syntax error near unexpected token '}'"

Changed to "too old" to avoid the apostrophe.

In bash, single-quoted strings cannot contain single quotes/apostrophes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

modules/security/bot-analyzer.sh

@@ -404,7 +404,7 @@ parse_logs() {
 
                 # Numerical comparison of epoch seconds
                 if (log_epoch != "" && log_epoch < cutoff_epoch) {
-                    next  # Skip this entry, it's too old
+                    next  # Skip this entry, too old
                 }
             }