build(deps): bump github.com/testcontainers/testcontainers-go

Bumps [github.com/testcontainers/testcontainers-go](https://github.com/testcontainers/testcontainers-go) from 0.39.0 to 0.40.0.
- [Release notes](https://github.com/testcontainers/testcontainers-go/releases)
- [Commits](https://github.com/testcontainers/testcontainers-go/compare/v0.39.0...v0.40.0)

---
updated-dependencies:
- dependency-name: github.com/testcontainers/testcontainers-go
  dependency-version: 0.40.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/github.com/testcontainers/testcontainers-go/wait/exec.go

@@ -2,6 +2,7 @@ package wait
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"time"
 
@@ -76,6 +77,22 @@ func (ws *ExecStrategy) Timeout() *time.Duration {
 	return ws.timeout
 }
 
+// String returns a human-readable description of the wait strategy.
+func (ws *ExecStrategy) String() string {
+	if len(ws.cmd) == 0 {
+		return "exec command"
+	}
+	// Only show the command name and argument count to avoid exposing sensitive data
+	argCount := len(ws.cmd) - 1
+	if argCount == 0 {
+		return fmt.Sprintf("exec command %q", ws.cmd[0])
+	}
+	if argCount == 1 {
+		return fmt.Sprintf("exec command %q with 1 argument", ws.cmd[0])
+	}
+	return fmt.Sprintf("exec command %q with %d arguments", ws.cmd[0], argCount)
+}
+
 func (ws *ExecStrategy) WaitUntilReady(ctx context.Context, target StrategyTarget) error {
 	timeout := defaultStartupTimeout()
 	if ws.timeout != nil {