[CI] Updates GitHub Actions

Author: picandocodigo

.github/workflows/main.yml renamed to .github/workflows/8.7.yml

@@ -1,11 +1,11 @@
-name: main
+name: 8.7
 on:
   push:
     branches:
-      - main
+      - 8.7
   pull_request:
     branches:
-      - main
+      - 8.7
 jobs:
   test-main:
     env:

.github/workflows/unified-release.yml

@@ -24,4 +24,3 @@ jobs:
         uses: actions/checkout@v2
       - name: Assemble ${{ env.STACK_VERSION }}
         run: "./.ci/make.sh assemble ${{ env.stack-version }}"
-