fix contributors url link (pingcap#13862)

tptpp · ngaut · commit 73ab6d818914 · 2019-12-05T19:50:15.000+08:00
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
@@ -1 +1 @@
-Contributor list is moved to [Contributors](https://github.com/pingcap/community/blob/master/contributors#tidb-contributors)
+Contributor list is moved to [Contributors](https://github.com/pingcap/community/blob/master/architecture/contributor-list.md#tidb-contributors)

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-Contributor list is moved to [Contributors](https://github.com/pingcap/community/blob/master/contributors#tidb-contributors)`
	`1`	`+Contributor list is moved to [Contributors](https://github.com/pingcap/community/blob/master/architecture/contributor-list.md#tidb-contributors)`