fix: default branch is main

Author: mosoriob

.github/workflows/backend.yml

@@ -57,7 +57,7 @@ jobs:
         IMAGE_ID=ikcap/disk_backend
         VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
         [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
-        [ "$VERSION" == "master" ] && VERSION=latest
+        [ "$VERSION" == "main" ] && VERSION=latest
         echo IMAGE_ID=$IMAGE_ID
         echo VERSION=$VERSION
         docker tag $IMAGE_NAME $IMAGE_ID:$GITHUB_SHA

.github/workflows/frontend.yml

@@ -57,7 +57,7 @@ jobs:
         IMAGE_ID=ikcap/disk_frontend
         VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
         [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
-        [ "$VERSION" == "master" ] && VERSION=latest
+        [ "$VERSION" == "main" ] && VERSION=latest
         echo IMAGE_ID=$IMAGE_ID
         echo VERSION=$VERSION
         docker tag $IMAGE_NAME $IMAGE_ID:$GITHUB_SHA