Updated HTTP request API (markdown)

HTTP-request-API.md

@@ -26,7 +26,7 @@ Parameter | Value Range | Description | Since Version
 &SX= | 0 to 255 | Effect Speed | 0.3
 &IX= | 0 to 255 | Effect Intensity | 0.5.0
 &FP= | 0 to 46 | FastLED Palette | 0.8.0
-&NL= | 0 to 255 | Nightlight active and duration | 0.3
+&NL= | 0 to 255 | Nightlight active and duration in minutes | 0.3
 &ND | none | Toggles nightlight on but uses default duration | 0.6.3
 &NT= | 0 to 255 | Nightlight target brightness | 0.5.0
 &NF= | 0 to 2 | Fade Nightlight, 1 = fade brightness only,<br/>2 = additionaly fade color from primary to secondary color | 0.5.0