fix broken link in old blog post

Author: SethTisue

blog/_posts/2018-02-14-tooling.md

@@ -73,7 +73,8 @@ During the meeting, we heard presentations on
 [Metals](https://github.com/scalameta/metals),
 [Bloop](https://github.com/scalacenter/bloop),
 [SBT](https://www.scala-sbt.org/),
-[Pants](https://www.pantsbuild.org/index.html), [Bazel](https://bazel.build/),
+[Pants](https://www.pantsbuild.org/docs),
+[Bazel](https://bazel.build/),
 [Ensime](https://github.com/ensime), [IntelliJ
 IDE](https://www.jetbrains.com/idea/), [Scala IDE](http://scala-ide.org/),
 [Dotty IDE](http://dotty.epfl.ch/docs/usage/ide-support.html) (Visual Studio Code),