feat(xp): add +1 in lose function xp part

README.md

@@ -16,7 +16,7 @@ message (number of different rune)
 - $xp-vocal(x)=0.01 x^{1.3}+1$ where $x$ is the time spent in vocal (in second)
 - $level(x)=0.2 \sqrt{x}$ where $x$ is the xp
 - $level^{-1}(x)=(5x)^2$ where $x$ is the level
-- $lose(x,y)= x^2\cdot 10^{-2+\ln(x/85)}\cdot\lfloor y/500 \rfloor$ where $x$ is the inactivity time (hour) and $y$ is the xp
+- $lose(x,y)= x^2\cdot 10^{-2+\ln(x/85)}\cdot\lfloor y/500 +1 \rfloor$ where $x$ is the inactivity time (hour) and $y$ is the xp
 
 ## Technologies