fix(i3blocks): fix battery block

The battery block would sometimes appear as "0%" in my Pixelbook because
acpi returned different battery numbers for the battery at different
times.

This commit fixes this by using upower instead.

GitOrigin-RevId: 292621bf17dbdeb6ef46d439aa5ed67cb7599ecf
diff --git a/private_dot_config/i3blocks/config b/private_dot_config/i3blocks/config
index 342fde7..f378fdc 100644
--- a/private_dot_config/i3blocks/config
+++ b/private_dot_config/i3blocks/config
@@ -43,7 +43,7 @@
 #interval=10
 
 [battery]
-BAT_NUMBER=1
+BAT_NUMBER=0
 interval=30
 
 [time]