Better PDF/A Conformance exception text

I had to check the source code to understand what this exception really meant, so I thought it could be written in a clearer way.

Closes Java GitHub PR 67.
DEVSIX-4955

Autoported commit.
Original commit hash: [fcaed1f58]

Author: dajoropo

itext/itext.pdfa/itext/pdfa/PdfAConformanceException.cs

@@ -255,7 +255,7 @@ public const String THE_F_KEYS_PRINT_FLAG_BIT_SHALL_BE_SET_TO_1_AND_ITS_HIDDEN_I
 
         public const String THE_PAGE_DICTIONARY_SHALL_NOT_CONTAIN_PRESSTEPS_ENTRY = "The page dictionary shall not contain pressteps entry";
 
-        public const String THE_PAGE_LESS_3_UNITS_NO_GREATER_14400_IN_EITHER_DIRECTION = "The page less 3 units no greater 14400 in either direction";
+        public const String THE_PAGE_LESS_3_UNITS_NO_GREATER_14400_IN_EITHER_DIRECTION = "The page is less than 3 units or greater than 14400 in either direction";
 
         public const String THE_SMASK_KEY_IS_NOT_ALLOWED_IN_EXTGSTATE = "The smask key is not allowed in extgstate";
 

port-hash

@@ -1 +1 @@
-076595cb2ad2ba96ebf3319ab6efb99b2ebbd2e0
+fcaed1f58de3dde627e650d1a781f3f8a21c428b