"Enable caching in Docker build steps in Github Actions

The change adds 'cache-from' and 'cache-to' parameters to the Docker build steps in the Github Actions pipeline.
This is done to speed up the building process by taking advantage of Docker layer caching in the Github Actions environment."

.github/workflows/release.yml

@@ -19,6 +19,8 @@ jobs:
           image-name: pulumi-operator-kubernetes-job
           dockerfile: pulumi-operator-kubernetes-job/Dockerfile
           extract-git-tag: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
   publish-pulumi-operator-kubernetes:
     runs-on: ubuntu-latest
     steps:
@@ -29,4 +31,6 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           image-name: pulumi-operator-kubernetes
           dockerfile: pulumi-operator-kubernetes/Dockerfile
-          extract-git-tag: true
+          extract-git-tag: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max