update tox and release workflow

.github/workflows/release.yaml

@@ -9,7 +9,7 @@ concurrency:
 on:
   push:
     branches:
-      - 14/edge
+      - 16/edge
     paths:
       - snap
 
@@ -24,7 +24,7 @@ jobs:
       - build
     uses: canonical/data-platform-workflows/.github/workflows/[email protected]
     with:
-      channel: 14/edge
+      channel: 16/edge
       artifact-prefix: ${{ needs.build.outputs.artifact-prefix }}
     secrets:
       snap-store-token: ${{ secrets.SNAP_STORE_TOKEN }}

tox.ini

@@ -4,8 +4,8 @@ env_list = lint,smoke
 
 [testenv]
 setenv =
-	version=14.0
-	channel=14.0/edge
+	version=16.4
+	channel=16.4/edge
 	vm-repo=https://github.com/canonical/postgresql-operator.git
 allowlist_externals =
     poetry