fix typo

when it contains percentages.

This is a really strange one. It's a linting warning in my editor
and it doesn't stop me from compiling, but it breaks `go test`.

A basic file to reproduce what I'm talking about:

package main

import "fmt"

func main() {
	notSprintf("test %s") // compiler complains here thinking %s needs a corresponding argument
}

func notSprintf(formatStr string, formatArgs ...interface{}) string {
	if formatArgs != nil {
		return formatStr
	}
	return fmt.Sprintf(formatStr, formatArgs...)
}

pkg/gui/keybindings.go

@@ -424,7 +424,7 @@ func (gui *Gui) GetInitialKeybindings() []*Binding {
 			Key:         'P',
 			Modifier:    gocui.ModNone,
 			Handler:     gui.handlePushTag,
-			Description: gui.Tr.SLocalize("pushTags"),
+			Description: gui.Tr.SLocalize("pushTag"),
 		},
 		{
 			ViewName:    "branches",

pkg/i18n/english.go

@@ -904,8 +904,8 @@ func addEnglish(i18nObject *i18n.Bundle) error {
 			ID:    "PushTagTitle",
 			Other: "remote to push tag '{{.tagName}}' to:",
 		}, &i18n.Message{
-			ID:    "pushTags",
-			Other: "push tags",
+			ID:    "pushTag",
+			Other: "push tag",
 		}, &i18n.Message{
 			ID:    "createTag",
 			Other: "create tag",