chore: bump GitHub Actions to Node.js 24-compatible versions

Updates workflow actions to address Node.js 20 deprecation warnings
that will become errors on June 2nd, 2026.

- actions/checkout@v4 -> v6
- actions/cache@v4 -> v5
- actions/upload-artifact@v4 -> v7
- apple-actions/import-codesign-certs@v3 -> v7

Author: inureyes

.github/workflows/ci.yml

@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Cache cargo
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/registry

.github/workflows/debian_build.yml

@@ -93,7 +93,7 @@ jobs:
     # Step 1: Checkout source code
     # ───────────────────────────────────────────────────────────────
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0  # Full history for changelog generation
 
@@ -244,7 +244,7 @@ jobs:
     # Step 11: Upload build artifacts
     # ───────────────────────────────────────────────────────────────
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: ${{ matrix.package }}_${{ env.PACKAGE_VERSION }}_ubuntu${{ matrix.version }}.${{ matrix.distro }}_${{ matrix.arch }}
         path: artifacts/

.github/workflows/launchpad_ppa.yml

@@ -36,7 +36,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
@@ -73,7 +73,7 @@ jobs:
 
     - name: Check out release tag
       if: steps.check_distro.outputs.should_run == 'true'
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         ref: ${{ steps.get_tag.outputs.tag }}
         fetch-depth: 0

.github/workflows/release.yml

@@ -70,11 +70,11 @@ jobs:
     steps:
       # 1) Checkout repository
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # 2) Cache Cargo build artifacts
       - name: Cache cargo
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/registry
@@ -105,7 +105,7 @@ jobs:
       # 6) macOS code signing
       - name: Import Distribution certificate
         if: runner.os == 'macOS'
-        uses: apple-actions/import-codesign-certs@v3
+        uses: apple-actions/import-codesign-certs@v7
         with:
           p12-file-base64: ${{ secrets.DEV_ID_CERT_P12 }}
           p12-password: ${{ secrets.DEV_ID_CERT_PASSWORD }}
@@ -222,7 +222,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Convert pre-release to official release
         run: |

.github/workflows/update_homebrew_formula.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout this repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install gnu-sed
         run: brew install gnu-sed