misc: `math/rand.Read()` has been deprecated

See: https://pkg.go.dev/math/rand@go1.20#Read

Signed-off-by: Hidde Beydals <hidde@hhh.computer>

internal/helm/chart/builder_test.go

@@ -17,8 +17,8 @@ limitations under the License.
 package chart
 
 import (
+	"crypto/rand"
 	"encoding/hex"
-	"math/rand"
 	"os"
 	"path/filepath"
 	"testing"

pkg/azure/blob_integration_test.go

@@ -21,11 +21,11 @@ package azure
 import (
 	"context"
 	"crypto/md5"
+	"crypto/rand"
 	"encoding/hex"
 	"errors"
 	"fmt"
 	"log"
-	"math/rand"
 	"os"
 	"path/filepath"
 	"strings"