chore: update branch pattern from v1.* to v1.x in CI/CD workflows

Author: saseungmin

.github/workflows/ci.yml

@@ -4,12 +4,12 @@ on:
     branches:
       - main
       - next
-      - v1.*
+      - v1.x
   pull_request:
     branches:
       - main
       - next
-      - v1.*
+      - v1.x
   merge_group:
     types:
       - checks_requested

.github/workflows/release.yml

@@ -5,7 +5,7 @@ on:
     branches:
       - main
       - next
-      - v1.*
+      - v1.x
 
 concurrency: ${{ github.workflow }}-${{ github.ref }}