chore: added a new input branch (#25)

* chore: added a new input `branch`

this is the update for previous commit, with this new input we can
select which branch we want to use from the cloudnative-pg project

Closes #23

Signed-off-by: Jonathan Gonzalez V <[email protected]>
Signed-off-by: Tao Li <[email protected]>
Co-authored-by: Jonathan Gonzalez V <[email protected]>

Author: litaocdl

.github/workflows/continuous-delivery.yml

@@ -113,7 +113,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: cloudnative-pg/cloudnative-pg
-          ref: ${{ env.BRANCH }}
+          ref: ${{ github.event.inputs.branch || 'main' }}
           fetch-depth: 0
 
       - name: Install Go