feat(deps): update graph dependencies

| datasource | package                               | from     | to      |
| ---------- | ------------------------------------- | -------- | ------- |
| docker     | ghcr.io/graphprotocol/indexer-service | v0.20.23 | v0.21.1 |

charts/graph-network-indexer/Chart.yaml

@@ -22,4 +22,4 @@ version: 0.2.4
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
 # renovate: image=ghcr.io/graphprotocol/indexer-service
-appVersion: "v0.20.23"
+appVersion: "v0.21.1"

charts/graph-network-indexer/README.md

@@ -2,7 +2,7 @@
 
 Deploy and scale the [Graph Network Indexer](https://github.com/graphprotocol/indexer) components inside Kubernetes with ease
 
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) ![Version: 0.2.4](https://img.shields.io/badge/Version-0.2.4-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v0.20.23](https://img.shields.io/badge/AppVersion-v0.20.23-informational?style=flat-square)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) ![Version: 0.2.4](https://img.shields.io/badge/Version-0.2.4-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v0.21.1](https://img.shields.io/badge/AppVersion-v0.21.1-informational?style=flat-square)
 
 ## Introduction