Rename integration test "ResetUpstream"

We are unsetting upstream in it, not resetting to upstream

pkg/integration/tests/branch/unset_upstream.go

@@ -5,7 +5,7 @@ import (
 	. "github.com/jesseduffield/lazygit/pkg/integration/components"
 )
 
-var ResetUpstream = NewIntegrationTest(NewIntegrationTestArgs{
+var UnsetUpstream = NewIntegrationTest(NewIntegrationTestArgs{
 	Description:  "Reset the upstream of a branch",
 	ExtraCmdArgs: []string{},
 	Skip:         false,

pkg/integration/tests/test_list.go

@@ -52,10 +52,10 @@ var tests = []*components.IntegrationTest{
 	branch.Rename,
 	branch.Reset,
 	branch.ResetToUpstream,
-	branch.ResetUpstream,
 	branch.SetUpstream,
 	branch.ShowDivergenceFromUpstream,
 	branch.Suggestions,
+	branch.UnsetUpstream,
 	cherry_pick.CherryPick,
 	cherry_pick.CherryPickConflicts,
 	cherry_pick.CherryPickDuringRebase,