Update dependency helm to v3.21.2

Author: renovate[bot]

.github/workflows/lint_test_charts.yaml

@@ -32,7 +32,7 @@ jobs:
       - uses: helm/chart-testing-action@v2.8.0
       - uses: azure/setup-helm@v5
         with:
-          version: 'v3.19.2'
+          version: 'v3.21.2'
 
       - name: Set up helm-unittest
         # workaround for https://github.com/helm-unittest/helm-unittest/issues/790
@@ -97,7 +97,7 @@ jobs:
       - uses: helm/chart-testing-action@v2.8.0
       - uses: azure/setup-helm@v5
         with:
-          version: 'v3.19.2'
+          version: 'v3.21.2'
 
       - name: Install Minikube
         uses: manusa/actions-setup-minikube@v2.16.1
@@ -130,7 +130,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: azure/setup-helm@v5
         with:
-          version: 'v3.19.2'
+          version: 'v3.21.2'
 
       - name: Add helm repositories
         run: |
@@ -181,7 +181,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: azure/setup-helm@v5
         with:
-          version: 'v3.19.2'
+          version: 'v3.21.2'
 
       - name: Add helm repositories
         run: |