Adding weights to main section files

Updating for new TOC as per issue https://github.com/etcd-io/website/issues/81

Signed-off-by: Nate W <4453979+nate-double-u@users.noreply.github.com>

Documentation/_index.md

@@ -1,5 +1,6 @@
 ---
 title: etcd version ___
+weight: 1000
 ---
 
 These docs cover everything from setting up and running an etcd cluster to using etcd in applications. Improvements to these docs are encouraged through [pull requests](https://help.github.com/en/articles/about-pull-requests) to the [etcd project](https://github.com/etcd-io/etcd) on GitHub.

Documentation/benchmarks/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Benchmarks
+weight: 5000
 ---

Documentation/dev-guide/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Developer guide
+weight: 3000
 ---

Documentation/learning/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Learning
+weight: 2000
 ---

Documentation/op-guide/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Operations guide
+weight: 4000
 ---

Documentation/platforms/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Platforms
+weight: 7000
 ---

Documentation/triage/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Triage
+weight: 8000
 ---

Documentation/upgrades/_index.md

@@ -1,3 +1,4 @@
 ---
 title: Upgrading
+weight: 6000
 ---