deploy: sitemap publish config fixes

- Updated to create sitemap directory before generating sitemaps.
- Fixed GCS bucket name.

Change-Id: Iff65da813e8b4d505634b854ce9acba54cb26299
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/366579
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Trust: Jamal Carvalho <jamal@golang.org>
diff --git a/deploy/sitemap.yaml b/deploy/sitemap.yaml
index c81b000..d324c20 100644
--- a/deploy/sitemap.yaml
+++ b/deploy/sitemap.yaml
@@ -22,6 +22,7 @@
         ./cloud_sql_proxy \
           -instances=$PROJECT_ID:us-central1:$(database_name $_ENV)=tcp:$(database_port $_ENV) & \
           sleep 1
+        mkdir sitemap
         go run ./devtools/cmd/sitemap -user=cloudbuild -password="$$PASSWORD" $_ENV
     secretEnv: ['PASSWORD']
   - id: Publish
@@ -31,7 +32,7 @@
       - cp
       - -r
       - sitemap
-      - gs://$_ENV-pkg-go.dev
+      - gs://$_ENV-pkg.go.dev
 availableSecrets:
   secretManager:
   - versionName: projects/$PROJECT_ID/secrets/cloudbuild-database-password/versions/latest