(DOCSP-45831) Fixes typo that prevented Netlify from building 1.29 branch. (#2016)

Author: erabil-mdb

.backportrc.json

@@ -2,7 +2,7 @@
     "repoOwner": "10gen",
     "repoName": "docs-k8s-operator",
 
-    "targetBranchChoices": ["1.29", "v1.28", "v1.27", "v1.26", "v1.25", "v1.24", "v1.23"],
+    "targetBranchChoices": ["v1.29", "v1.28", "v1.27", "v1.26", "v1.25", "v1.24", "v1.23"],
 
     "editor": "code",