[CI] Updates versions in GitHub Actions

Author: picandocodigo

.github/workflows/main.yml

@@ -1,11 +1,11 @@
-name: main
+name: 8.8
 on:
   push:
     branches:
-      - main
+      - 8.8
   pull_request:
     branches:
-      - main
+      - 8.8
 jobs:
   test-main:
     env:
@@ -26,7 +26,7 @@ jobs:
         sudo sysctl -w vm.max_map_count=262144
     - uses: elastic/elastic-github-actions/elasticsearch@master
       with:
-        stack-version: 8.8.0-SNAPSHOT
+        stack-version: 8.8-SNAPSHOT
         security-enabled: false
     - uses: ruby/setup-ruby@v1
       with: