Update punctuation (#30757)

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

diff --git a/README.md b/README.md
index 36bac982e0b3d0bed083674d5f4ad7505ac444eb..7ef4ca9aabb278bbb7e884855769b71da54b343f 100644 (file)
--- a/README.md
+++ b/README.md
@@ -214,4 +214,4 @@ Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com
 
 ## Copyright and license
 
-Code and documentation copyright 2011-2020 the [Bootstrap Authors](https://github.com/twbs/bootstrap/graphs/contributors) and [Twitter, Inc.](https://twitter.com) Code released under the [MIT License](https://github.com/twbs/bootstrap/blob/master/LICENSE). Docs released under [Creative Commons](https://creativecommons.org/licenses/by/3.0/).
+Code and documentation copyright 2011–2020 the [Bootstrap Authors](https://github.com/twbs/bootstrap/graphs/contributors) and [Twitter, Inc.](https://twitter.com) Code released under the [MIT License](https://github.com/twbs/bootstrap/blob/master/LICENSE). Docs released under [Creative Commons](https://creativecommons.org/licenses/by/3.0/).