Remap SARIF severity levels for compatibility with GitHub Action (#20)

* Remap SARIF severity levels for consistency with GitHub Action

* Remap High to WARNING instead of CRITICAL

Author: awsgaucho

src/main/java/com/amazonaws/gurureviewercli/adapter/ResultsAdapter.java

@@ -211,11 +211,9 @@ private static String getSarifSeverity(RecommendationSummary recommendation) {
         }
         switch (recommendation.severity()) {
             case INFO:
-                return Result.Level.NONE.value();
             case LOW:
-                return Result.Level.NONE.value();
+                return Result.Level.NOTE.value();
             case MEDIUM:
-                return Result.Level.NONE.value();
             case HIGH:
                 return Result.Level.WARNING.value();
             case CRITICAL: