Add comment to MemoryLimitsAwareOutputStream#write()

DEVSIX-3766

Author: LodrKumquat

kernel/src/main/java/com/itextpdf/kernel/pdf/MemoryLimitsAwareOutputStream.java

@@ -108,6 +108,7 @@ public MemoryLimitsAwareOutputStream setMaxStreamSize(int maxStreamSize) {
      */
     @Override
     public synchronized void write(byte[] b, int off, int len) {
+        // NOTE: in case this method is updated, the ManualCompressionTest should be run!
         if ((off < 0) || (off > b.length) || (len < 0) ||
                 ((off + len) - b.length > 0)) {
             throw new IndexOutOfBoundsException();