Fixes typo in progressbar.dm and progress bar sprite file name (#77299)

## About The Pull Request
I gotta wonder how long it's been like that.

## Why It's Good For The Game
Fixes #77295

## Changelog
🆑 Vekter
spellcheck: Fixed a typo in progressbar.dm and the file name for the
progress bar sprites.
/🆑

code/datums/progressbar.dm

@@ -34,7 +34,7 @@
 		return
 	goal = goal_number
 	bar_loc = target
-	bar = image('icons/effects/progessbar.dmi', bar_loc, "prog_bar_0")
+	bar = image('icons/effects/progressbar.dmi', bar_loc, "prog_bar_0")
 	SET_PLANE_EXPLICIT(bar, ABOVE_HUD_PLANE, User)
 	bar.appearance_flags = APPEARANCE_UI_IGNORE_ALPHA
 	user = User