Update dependency helm to v4

Signed-off-by: Mend Renovate <bot@renovateapp.com>

Author: renovate-bot

.github/actions/prepare-k8s/action.yaml

@@ -5,7 +5,7 @@ runs:
     - name: Set up Helm
       uses: azure/setup-helm@v5
       with:
-        version: v3.14.4
+        version: v4.2.3
 
     # Python is required because `ct lint` runs Yamale (https://github.com/23andMe/Yamale) and
     # yamllint (https://github.com/adrienverge/yamllint) which require Python

.github/workflows/lint-test.yaml

@@ -12,7 +12,7 @@ jobs:
 
       - uses: azure/setup-helm@v5
         with:
-          version: v3.14.4
+          version: v4.2.3
 
       # Python is required because `ct lint` runs Yamale (https://github.com/23andMe/Yamale) and
       # yamllint (https://github.com/adrienverge/yamllint) which require Python

.github/workflows/release.yaml

@@ -22,7 +22,7 @@ jobs:
       - name: Install Helm
         uses: azure/setup-helm@v5
         with:
-          version: v3.14.4
+          version: v4.2.3
 
       - name: Add dependency chart repos
         run: |