build(deps): bump git-testament from 0.2.5 to 0.2.6

Bumps [git-testament](https://github.com/kinnison/git-testament) from 0.2.5 to 0.2.6.
- [Commits](kinnison/git-testament@0.2.5...0.2.6)

---
updated-dependencies:
- dependency-name: git-testament
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -11,4 +11,4 @@ graph-chain-arweave = { path = "../../chain/arweave" }
 graph-chain-ethereum = { path = "../../chain/ethereum" }
 graph-chain-near = { path = "../../chain/near" }
 graph-chain-substreams = { path = "../../chain/substreams" }
-git-testament = "0.2.5"
+git-testament = "0.2.6"

server/index-node/Cargo.toml

@@ -28,7 +28,7 @@ serde = { workspace = true }
 serde_json = { workspace = true }
 stable-hash_legacy = { git = "https://github.com/graphprotocol/stable-hash", branch = "old", package = "stable-hash" }
 anyhow = "1.0.86"
-git-testament = "0.2.5"
+git-testament = "0.2.6"
 itertools = "0.13.0"
 hex = "0.4.3"
 pretty_assertions = "1.4.0"