Backport PR #42556: CI: Run all GHA checks on backport branch (#42561)

Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

Author: simonjayhawkins

.github/workflows/ci.yml

@@ -2,7 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [master]
+    branches:
+      - master
+      - 1.3.x
   pull_request:
     branches:
       - master
@@ -123,15 +125,15 @@ jobs:
         echo "${{ secrets.server_ssh_key }}" > ~/.ssh/id_rsa
         chmod 600 ~/.ssh/id_rsa
         echo "${{ secrets.server_ip }} ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBE1Kkopomm7FHG5enATf7SgnpICZ4W2bw+Ho+afqin+w7sMcrsa0je7sbztFAV8YchDkiBKnWTG4cRT+KZgZCaY=" > ~/.ssh/known_hosts
-      if: github.event_name == 'push'
+      if: ${{github.event_name == 'push' && github.ref == 'refs/head/master'}}
 
     - name: Upload web
       run: rsync -az --delete --exclude='pandas-docs' --exclude='docs' --exclude='Pandas_Cheat_Sheet*' web/build/ docs@${{ secrets.server_ip }}:/usr/share/nginx/pandas
-      if: github.event_name == 'push'
+      if: ${{github.event_name == 'push' && github.ref == 'refs/head/master'}}
 
     - name: Upload dev docs
       run: rsync -az --delete doc/build/html/ docs@${{ secrets.server_ip }}:/usr/share/nginx/pandas/pandas-docs/dev
-      if: github.event_name == 'push'
+      if: ${{github.event_name == 'push' && github.ref == 'refs/head/master'}}
 
     - name: Move docs into site directory
       run: mv doc/build/html web/build/docs