package/tesseract-ocr: fix typo on BR2_PACKAGE_TESSERACT_OCR_LANG_GER

The typo was added in 2017 by commit
'd1103eeab3 tesseract-ocr: new package'

Cc: Gilles Talis <gilles.talis@gmail.com>
Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/tesseract-ocr/tesseract-ocr.mk

@@ -39,7 +39,7 @@ ifeq ($(BR2_PACKAGE_TESSERACT_OCR_LANG_FRA),y)
 TESSERACT_OCR_DATA_FILES += fra.traineddata
 endif
 
-ifeq ($(BR2_PACKAGE_TESSERACT_OCR_LANG_DEU),y)
+ifeq ($(BR2_PACKAGE_TESSERACT_OCR_LANG_GER),y)
 TESSERACT_OCR_DATA_FILES += deu.traineddata
 endif