deps: Update symbolic (#34316)

This update includes some fixes to Debug File parsing as well as SourceMap parser improvements.

requirements-base.txt

@@ -61,7 +61,7 @@ snuba-sdk==0.1.5
 simplejson==3.17.2
 statsd==3.3
 structlog==21.1.0
-symbolic==8.3.2
+symbolic==8.7.1
 toronado==0.1.0
 typing-extensions==3.10.0.2
 ua-parser==0.10.0