fix typo

Signed-off-by: Qiwu Huang <huangqiwu@xiaomi.com>

Author: Qiwu Huang

README.md

@@ -24,8 +24,8 @@
 | oxygen-n-oss  | Mi MAX2 | Android N | LA.UM.5.6.r1-01900-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/oxygen-n-oss |
 | pisces-kk-oss  | Mi 3 China Mobile | Android KK | tegra-17r18-android-4.2 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/pisces-kk-oss |
 | riva-n-oss | Redmi 4A, Redmi 5, Redmi 5A | Android N | LA.UM.5.6.r1-05900-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/riva-n-oss |
-| sagit-n-oss  | Mi 6, Mi Mix 2 | Android O | LA.UM.6.4.r1-04900-8x98.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/sagit-o-oss |
-| sagit-o-oss  | Mi 6, Mi MIX2 | Android N | MSM8998.LA.1.1.r1-00232-STD.PROD | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/sagit-n-oss |
+| sagit-O-oss  | Mi 6, Mi MIX2 | Android O | LA.UM.6.4.r1-04900-8x98.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/sagit-o-oss |
+| sagit-N-oss  | Mi 6, Mi MIX2 | Android N | MSM8998.LA.1.1.r1-00232-STD.PROD | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/sagit-n-oss |
 | santoni-n-oss  | Redmi 4X | Android N | LA.UM.5.6.r1-04600-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/santoni-n-oss |
 | scorpio-m-oss  | Mi 5, Mi 5s, Mi 5s Plus, Mi Mix, Mi Note 2 | Android M | LA.HB.1.3.1_101rb1275 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/scorpio-m-oss |
 | thomas-kk-oss  | Redmi 2 Standard | Android KK | LNX.LA.3.7.2.1.c6-02400-8x16.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/thomas-kk-oss |