Fix FloggerLogString issue flagged by error prone

See: [1] for more details.

[1] https://errorprone.info/bugpattern/FloggerLogString

Change-Id: Ia7b6bf9de7466b5bb8e1d66719eed789245c082f

src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
index 2ccf33b..03147fa 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/CreateReviewNotes.java
@@ -141,7 +141,7 @@
           markUninteresting(git, branch, rw, oldObjectId);
         }
       } catch (Exception e) {
-        logger.atSevere().withCause(e).log(e.getMessage());
+        logger.atSevere().withCause(e).log("%s", e.getMessage());
         return;
       }