ci(deps): update graph-toolbox dependencies (#347)

| datasource | package                    | from   | to     |
| ---------- | -------------------------- | ------ | ------ |
| npm        | @graphprotocol/indexer-cli | 0.25.3 | 0.25.6 |

Co-authored-by: graphops-renovate[bot] <135047802+graphops-renovate[bot]@users.noreply.github.com>

Author: graphops-renovate[bot]

dockerfiles/graph-toolbox/Dockerfile

@@ -3,7 +3,7 @@ ARG RUST_VERSION="1"
 # renovate: datasource=docker depName=graphprotocol/graph-node
 ARG GRAPH_NODE_VERSION="v0.41.1"
 # renovate: datasource=npm depName=@graphprotocol/indexer-cli
-ARG INDEXER_VERSION="0.25.3"
+ARG INDEXER_VERSION="0.25.6"
 # renovate: datasource=npm depName=@graphprotocol/graph-cli
 ARG GRAPH_CLI_VERSION="0.98.1"