chore: Rename default branch from 'develop' to 'main'

Author: 유미라

.github/workflows/client-ci-cd.yml

@@ -2,7 +2,7 @@ name: Client CI/CD
 
 on:
   push:
-    branches: [develop]
+    branches: [main]
     paths:
       - 'client/**'
       - 'core/**'

.github/workflows/docker-compose-deploy.yml

@@ -2,7 +2,7 @@ name: Docker Compose Update
 
 on:
   push:
-    branches: [develop]
+    branches: [main]
     paths:
       - 'docker-compose.yml'
       - '.github/workflows/docker-compose-deploy.yml'

.github/workflows/server-ci-cd.yml

@@ -2,7 +2,7 @@ name: Server CI/CD
 
 on:
   push:
-    branches: [develop]
+    branches: [main]
     paths:
       - 'server/**'
       - 'core/**'