Flip teams to format <away>@<home>

Checking the first ten or so results, the ESPN API always seems to
return them in this order. If that ever stops being the case, we can
always check if `competitors[0]` is home or away, but that appears to be
unnecessary at this point.

Requested-By: Eric Villnow
Fixes: #2

go.mod

@@ -1,5 +1,5 @@
 module git.chandlerswift.com/chandlerswift/bannergen
 
-go 1.23.4
+go 1.23.0
 
 require golang.org/x/image v0.23.0

static/upcoming-games.html

@@ -70,10 +70,10 @@
           const competition = event.competitions[0];
           console.log(competition);
           const params = new URLSearchParams({
-              left_logo: competition.competitors[0].team.logo,
+              left_logo: competition.competitors[1].team.logo,
-              right_logo: competition.competitors[1].team.logo,
+              right_logo: competition.competitors[0].team.logo,
-              left_color: competition.competitors[0].team.color,
+              left_color: competition.competitors[1].team.color,
-              right_color: competition.competitors[1].team.color,
+              right_color: competition.competitors[0].team.color,
           });
 
           const a = document.createElement('a');