chore: replace all CI references to nightly with nightly-testing (#103)

Author: kim-em

.github/workflows/build.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
     branches: ["main"]
   push:
-    branches: ["main", "nightly"]
+    branches: ["main", "nightly-testing"]
   workflow_dispatch:
 
 concurrency:

.github/workflows/update-nightly.yaml

@@ -1,4 +1,4 @@
-name: Update Nightly
+name: Update nightly-testing
 
 on:
   schedule:
@@ -13,7 +13,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v6
         with:
-          ref: nightly
+          ref: nightly-testing
           token: ${{ secrets.UNICODE_BASIC_TOKEN }}
 
       - name: install jq
@@ -41,4 +41,4 @@ jobs:
       - name: commit and push
         run: |
           git commit -m "chore: update toolchain ${{ steps.toolchain-tag.outputs.lean_tag }}"
-          git push --force origin nightly
+          git push --force origin nightly-testing

.github/workflows/update-toolchain.yml

@@ -33,7 +33,7 @@ jobs:
         run: |
           git config user.name "${{ github.actor }}"
           git config user.email "${{ github.actor_id}}+${{ github.actor }}@users.noreply.github.com"
-          git merge -X theirs origin/nightly
+          git merge -X theirs origin/nightly-testing
           echo "leanprover/lean4:${{ steps.toolchain-tag.outputs.lean_tag }}" > lean-toolchain
 
       - name: create pull request