ci: bump helm/chart-testing-action from 2.7.0 to 2.8.0

Bumps [helm/chart-testing-action](https://github.com/helm/chart-testing-action) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/helm/chart-testing-action/releases)
- [Commits](helm/chart-testing-action@v2.7.0...v2.8.0)

---
updated-dependencies:
- dependency-name: helm/chart-testing-action
  dependency-version: 2.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/lint-test.yaml

@@ -43,7 +43,7 @@ jobs:
           python-version: '3.12'
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
 
       - name: List changed charts
         id: list-changed
@@ -82,7 +82,7 @@ jobs:
           version: v3.19.4
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
 
       - name: Get changed charts
         id: set-matrix
@@ -201,7 +201,7 @@ jobs:
           version: v3.19.4
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
 
       - name: Create kind cluster
         uses: helm/kind-action@v1.13.0

.github/workflows/release.yaml

@@ -44,7 +44,7 @@ jobs:
           version: v3.19.4
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
 
       - name: Detect charts to release
         id: set-matrix