Avoid anchor problem with stack

Author: theletterf

updatecli/updatecli.d/versions.yml

@@ -293,10 +293,11 @@ targets:
     name: 'Update config/versions.yml stack {{ source "latest-stack-version" }}'
     scmid: githubConfig
     sourceid: latest-stack-version
-    kind: yaml
+    kind: file
     spec:
       file: config/versions.yml
-      key: versioning_systems.stack.current
+      matchpattern: '(stack: &stack\s+base: [\d\.]+\s+current:)\s+(.+)'
+      replacepattern: '$1 {{ source "latest-stack-version" }}'
 
   update-docs-docset-android:
     name: 'Update config/versions.yml edot-android {{ source "latest-edot-android-version" }}'