chore(workflows): update workflows for new repo structure

.github/workflows/nightly-build.yml

@@ -52,6 +52,8 @@ jobs:
     steps:
       - name: Check out Git repository
         uses: actions/checkout@v4
+        with:
+          ref: develop
 
       - name: Install Node.js
         uses: actions/setup-node@v4

.github/workflows/pr-ci.yml

@@ -5,6 +5,7 @@ on:
   pull_request:
     branches:
       - main
+      - develop
 
 jobs:
   build:

.github/workflows/release.yml

@@ -26,6 +26,8 @@ jobs:
     steps:
       - name: Check out Git repository
         uses: actions/checkout@v4
+        with:
+          ref: main
 
       - name: Get release tag
         id: get-tag