Add label for power management

PCBs/FlipperZero/WiFi-Devboard-Pro/WiFi-Devboard-Pro.kicad_sch

@@ -1587,6 +1587,10 @@
     (effects (font (size 4 4)) (justify left bottom))
     (uuid 4619ff43-4f12-4dbd-b767-fb6f55c7aa1d)
   )
+  (text "Power" (at 294.64 90.17 0)
+    (effects (font (size 1.27 1.27)) (justify left bottom))
+    (uuid 4e998a25-6aa7-4259-9b06-6dcb2ffd2354)
+  )
   (text "Flipper Zero Connection" (at 12.7 196.85 0)
     (effects (font (size 1.27 1.27)) (justify left bottom))
     (uuid 849f4f66-b83c-4d8e-94b3-f089f8abbc49)