git: b8d4d67fda - main - Bump copyright year to 2021

[Ganbold Tsagaankhuu]

The branch main has been updated by ganbold:

URL: https://cgit.FreeBSD.org/doc/commit/?id=b8d4d67fda46813020ee130d32151db0671c94c1

commit b8d4d67fda46813020ee130d32151db0671c94c1
Author:     Ganbold Tsagaankhuu <ganbold at FreeBSD.org>
AuthorDate: 2021-01-01 07:19:04 +0000
Commit:     Ganbold Tsagaankhuu <ganbold at FreeBSD.org>
CommitDate: 2021-01-01 07:19:04 +0000

    Bump copyright year to 2021
---
 en_US.ISO8859-1/books/handbook/book.xml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/en_US.ISO8859-1/books/handbook/book.xml b/en_US.ISO8859-1/books/handbook/book.xml
index 9f32249fc1..260de42a1b 100644
--- a/en_US.ISO8859-1/books/handbook/book.xml
+++ b/en_US.ISO8859-1/books/handbook/book.xml
@@ -67,6 +67,7 @@
       <year>2018</year>
       <year>2019</year>
       <year>2020</year>
+      <year>2021</year>
       <holder>The FreeBSD Documentation Project</holder>
     </copyright>