fix typo

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

Author: Qiwu Huang

README.md

@@ -32,4 +32,4 @@
 | tissot-n-oss  | Mi A1 | Android O | LA.UM.6.6.r1-04000-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/tissot-o-oss |
 | tissot-o-oss | Mi A1 | Android N | LA.UM.5.3-06310-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/tissot-n-oss |
 | whyred-n-oss | Redmi Note 5 | Android N | LA.UM.6.1.r1-11000-sdm660.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/whyred-n-oss |
-| tiffany-n-oss | Xiaomi5X, Redmi 5Plus | Android O | LA.UM.5.3-06310-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/tiffany-n-oss |
+| tiffany-n-oss | Xiaomi5X, Redmi 5Plus | Android N | LA.UM.5.3-06310-89xx.0 | https://github.com/MiCode/Xiaomi_Kernel_OpenSource/tree/tiffany-n-oss |