chore: rename "Set/Unset upstream" menu to "Upstream Options"

This should already have been done when adding the "View divergence from
upstream" command, but now we're going to add yet another item to the menu that
is unrelated to setting or unsetting the upstream.

docs/keybindings/Keybindings_en.md

@@ -155,7 +155,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
   <kbd>T</kbd>: Create tag
   <kbd>g</kbd>: View reset options
   <kbd>R</kbd>: Rename branch
-  <kbd>u</kbd>: Set/Unset upstream
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: View commits
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_ja.md

@@ -227,7 +227,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
   <kbd>T</kbd>: タグを作成
   <kbd>g</kbd>: View reset options
   <kbd>R</kbd>: ブランチ名を変更
-  <kbd>u</kbd>: Set/Unset upstream
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: コミットを閲覧
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_ko.md

@@ -190,7 +190,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
   <kbd>T</kbd>: 태그를 생성
   <kbd>g</kbd>: View reset options
   <kbd>R</kbd>: 브랜치 이름 변경
-  <kbd>u</kbd>: Set/Unset upstream
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: 커밋 보기
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_nl.md

@@ -97,7 +97,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
   <kbd>T</kbd>: Creëer tag
   <kbd>g</kbd>: Bekijk reset opties
   <kbd>R</kbd>: Hernoem branch
-  <kbd>u</kbd>: Set/Unset upstream
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: Bekijk commits
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_pl.md

@@ -113,7 +113,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
   <kbd>T</kbd>: Create tag
   <kbd>g</kbd>: Wyświetl opcje resetu
   <kbd>R</kbd>: Rename branch
-  <kbd>u</kbd>: Set/Unset upstream
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: View commits
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_ru.md

@@ -188,7 +188,7 @@ _Связки клавиш_
   <kbd>T</kbd>: Создать тег
   <kbd>g</kbd>: Просмотреть параметры сброса
   <kbd>R</kbd>: Переименовать ветку
-  <kbd>u</kbd>: Установить/убрать upstream-ветку
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: Просмотреть коммиты
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_zh-CN.md

@@ -91,7 +91,7 @@ _Legend: `<c-b>` means ctrl+b, `<a-b>` means alt+b, `B` means shift+b_
   <kbd>T</kbd>: 创建标签
   <kbd>g</kbd>: 查看重置选项
   <kbd>R</kbd>: 重命名分支
-  <kbd>u</kbd>: Set/Unset upstream
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: 查看提交
   <kbd>/</kbd>: Filter the current view by text

docs/keybindings/Keybindings_zh-TW.md

@@ -263,7 +263,7 @@ _說明：`<c-b>` 表示 Ctrl+B、`<a-b>` 表示 Alt+B，`B`表示 Shift+B_
   <kbd>T</kbd>: 建立標籤
   <kbd>g</kbd>: 檢視重設選項
   <kbd>R</kbd>: 重新命名分支
-  <kbd>u</kbd>: 設定/取消設定上游
+  <kbd>u</kbd>: View upstream options
   <kbd>w</kbd>: View worktree options
   <kbd>&lt;enter&gt;</kbd>: 檢視提交
   <kbd>/</kbd>: Filter the current view by text