[myanmar] Fix comments on categories

https://github.com/harfbuzz/harfbuzz/pull/3648#discussion_r894955430

src/hb-ot-shaper-indic.hh

@@ -88,14 +88,14 @@ enum ot_category_t {
   OT_D0      = 34,	// Digit zero
   OT_DB      = OT_N,	// Dot below
   OT_GB	     = OT_PLACEHOLDER,
-  OT_MH      = 35,	// Medial Ha, Mon La
+  OT_MH      = 35,	// Medial Ha
   OT_MR      = 36,	// Medial Ra
   OT_MW      = 37,	// Medial Wa, Shan Wa
   OT_MY      = 38,	// Medial Ya, Mon Na, Mon Ma
   OT_PT      = 39,	// Pwo and other tones
   OT_VS      = 40,	// Variation selectors
   OT_P       = 41,	// Punctuation
-  OT_ML      = 42,	// Consonant medials
+  OT_ML      = 42,	// Medial Mon La
 };
 
 /* Visual positions in a syllable from left to right. */

src/hb-ot-shaper-myanmar-machine.rl

@@ -81,14 +81,14 @@ export VPst = 23;
 export As   = 32;	# Asat
 export D    = 33;	# Digits except zero
 export D0   = 34;	# Digit zero
-export MH   = 35;	# Medial Ha, Mon La
+export MH   = 35;	# Medial Ha
 export MR   = 36;	# Medial Ra
 export MW   = 37;	# Medial Wa, Shan Wa
 export MY   = 38;	# Medial Ya, Mon Na, Mon Ma
 export PT   = 39;	# Pwo and other tones
 export VS   = 40;	# Variation selectors
 export P    = 41;	# Punctuation
-export ML   = 42;	# Consonant medials
+export ML   = 42;	# Medial Mon La
 
 
 j = ZWJ|ZWNJ;			# Joiners