chore: pin GitHub Actions versions to commit hashes (#123)

This will help prevent attacks such as [this
one](https://semgrep.dev/blog/2025/popular-github-action-tj-actionschanged-files-is-compromised/).

Dependabot is able to update these versions automatically, and it will
preserve the readable version comments.

Author: WillDaSilva

.github/workflows/project_add.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.actor != 'dependabot[bot]' }}
     steps:
-      - uses: actions/add-to-project@v1.0.2
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/MeltanoLabs/projects/3
           github-token: ${{ secrets.MELTYBOT_PROJECT_ADD_PAT }}

.github/workflows/release.yml

@@ -14,20 +14,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         fetch-depth: 0
 
     - run: git fetch --force --tags
 
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
       with:
         go-version: 1.24
         cache: true
 
     - name: Run GoReleaser
-      uses: goreleaser/goreleaser-action@v6
+      uses: goreleaser/goreleaser-action@90a3faa9d0182683851fbfa97ca1a2cb983bfca3 # v6.2.1
       with:
         distribution: goreleaser
         version: latest

.github/workflows/test.yml

@@ -26,9 +26,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
         with:
           go-version: ${{ matrix.go-version }}
           cache: true
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Start MinIO
         if: ${{ matrix.fs == 's3' }}
@@ -66,7 +66,7 @@ jobs:
           quay.io/minio/minio server /data --console-address ":9090"
 
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
         with:
           go-version: stable
           cache: true