diff --git a/.github/workflows/publish-technical-documentation-release.yml b/.github/workflows/publish-technical-documentation-release.yml
index f0cc55bfd36..e8864acfcb4 100644
--- a/.github/workflows/publish-technical-documentation-release.yml
+++ b/.github/workflows/publish-technical-documentation-release.yml
@@ -34,7 +34,7 @@ jobs:
         with:
           ref_name: "${{ github.ref_name }}"
           release_tag_regexp: "^v(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)$"
-          release_branch_regexp: "^v(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(?:0|[1-9]\\d*)$"
+          release_branch_regexp: "^v(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.x$"
 
       - name: "Determine technical documentation version"
         if: "steps.has-matching-release-tag.outputs.bool == 'true'"