SLING-7583 - Log tracer runs into ClassCastException for oak-queries

Fix as per suggestion from Dirk
diff --git a/src/main/java/org/apache/sling/tracer/internal/TracerContext.java b/src/main/java/org/apache/sling/tracer/internal/TracerContext.java
index 0474662..a3e1b3e 100644
--- a/src/main/java/org/apache/sling/tracer/internal/TracerContext.java
+++ b/src/main/java/org/apache/sling/tracer/internal/TracerContext.java
@@ -89,7 +89,7 @@
         FormattingTuple tuple = null;
         if (QUERY_LOGGER.equals(logger)
                 && params != null && params.length == 2) {
-            if (logQuery((String) params[1])){
+            if (logQuery(String.valueOf(params[1]))){
                 //Get original log message
                 tuple = logWithLoggerName(logger, format, params);
             }