build: update e2e{-*} workflows

To include a version number behind the actions with a SHA reference, so
Dependabot will continue to update them from now on.

Signed-off-by: Hidde Beydals <hidde@hhh.computer>

.github/workflows/e2e-bootstrap.yaml

@@ -16,16 +16,16 @@ jobs:
     if: (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) && github.actor != 'dependabot[bot]'
     steps:
       - name: Checkout
-        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c
+        uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
       - name: Restore Go cache
-        uses: actions/cache@69d9d449aced6a2ede0bc19182fadc3a0a42d2b0
+        uses: actions/cache@69d9d449aced6a2ede0bc19182fadc3a0a42d2b0 # v3.2.6
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go1.20-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-go1.20-
       - name: Setup Go
-        uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568
+        uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568 # v3.5.0
         with:
           go-version: 1.20.x
       - name: Setup Kubernetes
@@ -35,7 +35,7 @@ jobs:
           cluster_name: kind
           node_image: kindest/node:v1.25.2
       - name: Setup Kustomize
-        uses: fluxcd/pkg//actions/kustomize@main
+        uses: fluxcd/pkg/actions/kustomize@main
       - name: Build
         run: |
           make cmd/flux/.manifests.done