Bump actions/download-artifact from 4.1.2 to 6.0.0

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.2 to 6.0.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4.1.2...018cc2c)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -208,7 +208,7 @@ jobs:
             ~/go/pkg/mod
           key: ${{ runner.os }}-go-
       - name: Download Packages
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build
@@ -264,7 +264,7 @@ jobs:
             ~/go/pkg/mod
           key: ${{ runner.os }}-go-
       - name: Download Packages
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build
@@ -327,7 +327,7 @@ jobs:
             ~/go/pkg/mod
           key: ${{ runner.os }}-go-
       - name: Download Packages
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build
@@ -400,7 +400,7 @@ jobs:
             ~/go/pkg/mod
           key: ${{ runner.os }}-go-
       - name: Download Packages
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build
@@ -472,7 +472,7 @@ jobs:
             ~/go/pkg/mod
           key: ${{ runner.os }}-go-
       - name: Download Packages
-        uses: actions/download-artifact@eaceaf801fd36c7dee90939fad912460b18a1ffe # v4.1.2
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build
@@ -545,7 +545,7 @@ jobs:
             ~/go/pkg/mod
           key: ${{ runner.os }}-go-
       - name: Download Packages
-        uses: actions/download-artifact@eaceaf801fd36c7dee90939fad912460b18a1ffe # v4.1.2
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build
@@ -643,7 +643,7 @@ jobs:
           key: ${{ runner.os }}-go-
 
       - name: Download Packages
-        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           name: nginx-agent-unsigned-snapshots
           path: build