Fixed typo in the error exception

Author: milanmajchrak

dspace-api/src/main/java/org/dspace/content/PreviewContentServiceImpl.java

@@ -198,7 +198,7 @@ public List<FileInfo> processInputStreamToFilePreview(Context context, Bitstream
         String bitstreamMimeType = bitstream.getFormat(context).getMIMEType();
         if (bitstreamMimeType.equals("text/plain")) {
             if (!validateBitstreamNameWithType(bitstream, "zip,tar,gz,tar.gz,tar.bz2")) {
-                throw new IOException("he file has an incorrect type according to the MIME type stored in the " +
+                throw new IOException("The file has an incorrect type according to the MIME type stored in the " +
                         "database. This could cause the ZIP file to be previewed as a text file, potentially leading" +
                         " to a database error.");
             }