Remove references to "kur" and "tgl", add "fil" from man page

"kur" no longer exists, might be named "kur_ara" (the old "kur_ara" is
now "kmr", which is actually Latin) now, but "kur" is not present in
tessdata_fast nor in tessdata_best. [1] [2]

"tgl" (Tagalo) is now named "fil" (Filipino) [3]

[1] tesseract-ocr/langdata#124
[2] tesseract-ocr/tessdata_best#23
[3] tesseract-ocr/langdata#84

doc/tesseract.1.asc

@@ -203,6 +203,7 @@ following languages:
 *est* (Estonian),
 *eus* (Basque),
 *fas* (Persian),
+*fil* (Filipino),
 *fin* (Finnish),
 *fra* (French),
 *frk* (Frankish),
@@ -232,7 +233,6 @@ following languages:
 *kmr* (Kurdish Kurmanji),
 *kor* (Korean),
 *kor_vert* (Korean vertical),
-*kur* (Kurdish),
 *lao* (Lao),
 *lat* (Latin),
 *lav* (Latvian),
@@ -277,7 +277,6 @@ following languages:
 *tat* (Tatar),
 *tel* (Telugu),
 *tgk* (Tajik),
-*tgl* (Tagalog),
 *tha* (Thai),
 *tir* (Tigrinya),
 *ton* (Tonga),