Report Javadoc problems as warnings for most severe

Errors from javadoc look out of place for now.
Maybe in the future if/when there are settings for each of them they can
be switched back to errors depending on settings.

org.eclipse.jdt.core.javac/src/org/eclipse/jdt/internal/javac/JavacProblemConverter.java

@@ -67,7 +67,7 @@ public static JavacProblem createJavadocProblem(Diagnostic<? extends JavaFileObj
                 diagnostic.getCode(),
                 problemId,
                 new String[0],
-                toSeverity(diagnostic),
+                toJavadocSeverity(diagnostic),
                 diagnosticPosition.getOffset(),
                 diagnosticPosition.getOffset() + diagnosticPosition.getLength(),
                 (int) diagnostic.getLineNumber(),
@@ -198,6 +198,14 @@ private static int toSeverity(Diagnostic<? extends JavaFileObject> diagnostic) {
 			default -> ProblemSeverities.Error;
 		};
 	}
+
+	private static int toJavadocSeverity(Diagnostic<? extends JavaFileObject> diagnostic) {
+        return switch (diagnostic.getKind()) {
+            case ERROR, WARNING, MANDATORY_WARNING -> ProblemSeverities.Warning;
+            case NOTE -> ProblemSeverities.Info;
+            default -> ProblemSeverities.Warning;
+        };
+    }
 
 	/**
 	 * See the link below for Javac problem list: