chore: Update spelling

build/cSpell.json

@@ -156,6 +156,7 @@
 	"Ronica",
 	"Serilog",
 	"Sideloading",
+	"sideload",
 	"Singh",
 	"slnf",
 	"startscreen",

doc/articles/uno-publishing-windows.md

@@ -12,4 +12,3 @@ Using the Windows App SDK, it's possible to side-load an app using the following
 
 - [Build an unsigned packaged app](xref:uno.publishing.windows.sideload.packaged.unsigned)
 - [Build a signed packaged app](xref:uno.publishing.windows.sideload.packaged.signed)
-