corrected workflow to extract the correct branch name

Signed-off-by: swastik959 <swastik.gour@suse.com>

Author: swastik959

.github/workflows/release.yaml

@@ -166,10 +166,14 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ steps.app-token.outputs.token }}
         run: |
+          CURRENT_BRANCH="${{ github.ref_name }}"
+          BASE_VERSION=$(echo "$CURRENT_BRANCH" | sed -E 's/^[^v]*(v[0-9]+\.[0-9]+).*/\1/')
+          TRANSFORMED_VERSION="${BASE_VERSION/v1./v2.}"
+          TARGET_BRANCH="dev-${TRANSFORMED_VERSION}"
           VERSION_OVERRIDE="minor"
           gh workflow run "Manual Trigger for Auto Bump" \
             --repo rancher/charts \
-            --ref dev-v2.12 \
+            --ref "$TARGET_BRANCH" \
             -F chart=rancher-gke-operator \
-            -F branch=dev-v2.12 \
+            -F branch="$TARGET_BRANCH" \
             -F version-override=$VERSION_OVERRIDE