Update matrix-renovate-runner Docker tag to v44.56.3

.github/workflows/renovate.yml

@@ -43,7 +43,7 @@ env:
   MATRIX_RENOVATE_AUTOMATION_ENABLED: 'true'
 
   # renovate: datasource=docker depName=matrix-renovate-runner packageName=ghcr.io/renovatebot/renovate
-  MATRIX_RENOVATE_VERSION: '44.56.1'
+  MATRIX_RENOVATE_VERSION: '44.56.3'
 
 jobs:
   preflight: