ARROW-8005: Use downloads.apache.org download url (#51)

diff --git a/_data/versions.yml b/_data/versions.yml
index f49469a..fa2e08e 100644
--- a/_data/versions.yml
+++ b/_data/versions.yml
@@ -26,6 +26,6 @@
   tarball_name: 'apache-arrow-0.16.0.tar.gz'
   mirrors-tar: 'https://www.apache.org/dyn/closer.cgi/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz'
   java-artifacts: 'http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.arrow%22%20AND%20v%3A%220.16.0%22'
-  asc: 'https://www.apache.org/dist/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz.asc'
-  sha256: 'https://www.apache.org/dist/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz.sha256'
-  sha512: 'https://www.apache.org/dist/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz.sha512'
+  asc: 'https://downloads.apache.org/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz.asc'
+  sha256: 'https://downloads.apache.org/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz.sha256'
+  sha512: 'https://downloads.apache.org/arrow/arrow-0.16.0/apache-arrow-0.16.0.tar.gz.sha512'
diff --git a/install.md b/install.md
index 145cef1..bf2b120 100644
--- a/install.md
+++ b/install.md
@@ -195,7 +195,7 @@
 [5]: https://conda-forge.github.io
 [6]: {{site.data.versions['current'].mirrors-tar}}
 [10]: {{site.data.versions['current'].release-notes}}
-[11]: https://www.apache.org/dist/arrow/KEYS
+[11]: https://downloads.apache.org/arrow/KEYS
 [12]: https://www.apache.org/dyn/closer.cgi#verify
 [13]: {{site.data.versions['current'].asc}}
 [14]: {{site.data.versions['current'].sha256}}