It's 'tag-number-pattern' rather than 'tag-name-pattern'...

Author: tknerr

docs/configuration.md

@@ -350,7 +350,7 @@ When `release-2.0.0` is merged into master, we want master to build `2.0.0`. If
 `release-2.0.0` is merged into develop we want it to build `2.1.0`, this option
 prevents incrementing after a versioned branch is merged
 
-### tag-name-pattern
+### tag-number-pattern
 Pull requests require us to extract the pre-release number out of the branch
 name so `refs/pulls/534/merge` builds as `PullRequest.534`. This is a regex with
 a named capture group called `number`.
@@ -370,7 +370,7 @@ branches:
     tag: PullRequest
     increment: Inherit
     track-merge-target: true
-    tag-name-pattern: '[/-](?<number>\d+)[-/]'
+    tag-number-pattern: '[/-](?<number>\d+)[-/]'
 ```
 
 ### track-merge-target