fix stage 3 link

Author: Alan Shaw

docs/releases.md

@@ -7,7 +7,7 @@
   - [Stage 0 - Automated Testing](#stage-0---automated-testing)
   - [Stage 1 - Internal Testing](#stage-1---internal-testing)
   - [Stage 2 - Community Dev Testing](#stage-2---community-dev-testing)
-  - [Stage 3 - Community Prod Testing](#stage-2---community-prod-testing)
+  - [Stage 3 - Community Prod Testing](#stage-3---community-prod-testing)
   - [Stage 4 - Release](#stage-4---release)
 - [Release Cycle](#release-cycle)
   - [Patch Releases](#patch-releases)