Added missing Promtheus versions for regression testing

Signed-off-by: dhoard <doug.hoard@gmail.com>

Author: dhoard

integration_test_suite/integration_tests/src/test/resources/prometheus-docker-images.txt

@@ -5,5 +5,7 @@ prom/prometheus:v2.50.1
 prom/prometheus:v2.51.2
 prom/prometheus:v2.52.0
 prom/prometheus:v2.53.3
+prom/prometheus:v2.54.1
+prom/prometheus:v2.55.1
 prom/prometheus:v3.0.1
 prom/prometheus:v3.1.0