chore(i18n): update locales/ja.json (#2812)

* chore(i18n): update locales/ja.json

    Add ja translation for td-headers-attr.incomplete
    Add ja translation for svg-non-empty-title.{fail,incomplete}
    Correct ja translation for svg-non-empty-title.pass
    Add ja translation for presentational-role
    Add ja translation for non-empty-value.fail
    Correct ja translation for non-empty-value.pass
    Add ja translation for non-empty-title.fail
    Add ja translation for non-empty-placeholder
    Add ja translation for non-empty-alt.fail
    Add ja translation for has-visible-text.incomplete
    Add ja translation for button-has-visible-text.incomplete
    Add ja translation for aria-labelledby.incomplete
    Add ja translation for has-lang.fail
    Add ja translation for implicit-label.incomplete
    Add ja translation for hidden-explicit-label.incomplete
    Add ja translation for explicit-label.incomplete
    Add ja translation for no-focusable-content
    Add ja translation for frame-focusable-content
    Add ja translation for focusable-no-name.incomplete
    Add ja translation for color-contrast.incomplete.pseudoContent
    Add ja translation for is-element-focusable
    Add ja translation for has-global-aria-attribute
    Add ja translation for aria-prohibited-attr
    Add ja translation for aria-errormessage.incomplete
    Add ja translation for select-name
    Add ja translation for presentation-role-conflict
    Add ja translation for nested-interactive
    Add ja translation for frame-focusable-content
    Add ja translation for aria-treeitem-name
    Add ja translation for aria-tooltip-name
    Add ja translation for aria-text
    Add ja translation for aria-progressbar-name
    Add ja translation for aria-meter-name
    Add ja translation for aria-dialog-name
    Add ja translation for aria-command-name
    grunt translate --lang=ja (ran at Thu Feb 18 12:39:25 2021 +0900)

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* Update locales/ja.json

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>

* fix merge conflict

Co-authored-by: Kiyochika Nakamura <kiyochika@gmail.com>
Co-authored-by: Steven Lambert <steven.lambert@deque.com>