Bump to pre-release 6.10.0-pre.0 .

Author: cliffano-shn

.github/workflows/publish-workflow.yaml

@@ -9,7 +9,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
         with:
-          ref: 6.9.0
+          ref: 6.10.0-pre.0
       - uses: docker/login-action@v1
         with:
           registry: ghcr.io

Makefile

@@ -1,4 +1,4 @@
-version ?= 6.9.0
+version ?= 6.10.0-pre.0
 
 ci: clean deps lint package