Harden GitHub Actions workflows

- Pin every action ref to a full-length commit SHA with a trailing
  version comment, so floating tags like @v4 can't be re-pointed at
  malicious code.
- Bump outdated actions/checkout@v1 to @v4.3.1 (where present).
- Tag-triggered workflows now check out with fetch-depth: 1 and
  fetch-tags: true so the tag ref is available downstream.
- release-tracker.yml grants contents: write at the job level so the
  default GITHUB_TOKEN can push commits/tags back to the repo.

Signed-off-by: Tamal Saha <tamal@appscode.com>

Author: tamalsaha

.github/workflows/ci.yml

@@ -19,19 +19,19 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Set up Go 1.25
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.6.0
         with:
           go-version: '1.25'
         id: go
 
       - name: Use Node.js 20.x
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: '20'
           check-latest: true
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Prepare git
         env:

.github/workflows/release-tracker.yml

@@ -12,9 +12,11 @@ concurrency:
 jobs:
   build:
     runs-on: ubuntu-24.04
+    permissions:
+      contents: write
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Prepare git
         env:

.github/workflows/release.yml

@@ -15,10 +15,13 @@ jobs:
     name: Build
     runs-on: firecracker
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          fetch-depth: 1
+          fetch-tags: true
 
       - name: Set up Go 1.25
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5.6.0
         with:
           go-version: '1.25'
         id: go
@@ -47,12 +50,12 @@ jobs:
 
       - name: Set up QEMU
         id: qemu
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3.7.0
         with:
           cache-image: false
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Publish to GitHub Container Registry
         env:
@@ -75,7 +78,7 @@ jobs:
 #          make docker-certify-redhat
 
       - name: Release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@26994186c0ac3ef5cae75ac16aa32e8153525f77 # v1
         if: startsWith(github.ref, 'refs/tags/')
         with:
           files: |