chore: bump cloud.google.com/go/datastore from 1.20.0 to 1.21.0 (#767)

Bumps [cloud.google.com/go/datastore](https://github.com/googleapis/google-cloud-go) from 1.20.0 to 1.21.0.
- [Release notes](https://github.com/googleapis/google-cloud-go/releases)
- [Changelog](https://github.com/googleapis/google-cloud-go/blob/main/documentai/CHANGES.md)
- [Commits](googleapis/google-cloud-go@kms/v1.20.0...kms/v1.21.0)

---
updated-dependencies:
- dependency-name: cloud.google.com/go/datastore
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Minh Vu <[email protected]>

Author: dependabot[bot]

go.mod

@@ -5,7 +5,7 @@ go 1.24.0
 toolchain go1.24.1
 
 require (
-	cloud.google.com/go/datastore v1.20.0
+	cloud.google.com/go/datastore v1.21.0
 	github.com/btcsuite/btcutil v1.0.3-0.20201208143702-a53e38424cce
 	github.com/cenkalti/backoff/v4 v4.3.0
 	github.com/chzyer/readline v1.5.1 // indirect
@@ -70,7 +70,7 @@ require (
 )
 
 require (
-	cloud.google.com/go v0.120.0 // indirect
+	cloud.google.com/go v0.121.6 // indirect
 	cloud.google.com/go/compute/metadata v0.9.0 // indirect
 	github.com/DataDog/zstd v1.5.6 // indirect
 	github.com/FactomProject/basen v0.0.0-20150613233007-fe3947df716e // indirect

go.sum

@@ -1,14 +1,14 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.120.0 h1:wc6bgG9DHyKqF5/vQvX1CiZrtHnxJjBlKUyF9nP6meA=
-cloud.google.com/go v0.120.0/go.mod h1:/beW32s8/pGRuj4IILWQNd4uuebeT4dkOhKmkfit64Q=
+cloud.google.com/go v0.121.6 h1:waZiuajrI28iAf40cWgycWNgaXPO06dupuS+sgibK6c=
+cloud.google.com/go v0.121.6/go.mod h1:coChdst4Ea5vUpiALcYKXEpR1S9ZgXbhEzzMcMR66vI=
 cloud.google.com/go/auth v0.17.0 h1:74yCm7hCj2rUyyAocqnFzsAYXgJhrG26XCFimrc/Kz4=
 cloud.google.com/go/auth v0.17.0/go.mod h1:6wv/t5/6rOPAX4fJiRjKkJCvswLwdet7G8+UGXt7nCQ=
 cloud.google.com/go/auth/oauth2adapt v0.2.8 h1:keo8NaayQZ6wimpNSmW5OPc283g65QNIiLpZnkHRbnc=
 cloud.google.com/go/auth/oauth2adapt v0.2.8/go.mod h1:XQ9y31RkqZCcwJWNSx2Xvric3RrU88hAYYbjDWYDL+c=
 cloud.google.com/go/compute/metadata v0.9.0 h1:pDUj4QMoPejqq20dK0Pg2N4yG9zIkYGdBtwLoEkH9Zs=
 cloud.google.com/go/compute/metadata v0.9.0/go.mod h1:E0bWwX5wTnLPedCKqk3pJmVgCBSM6qQI1yTBdEb3C10=
-cloud.google.com/go/datastore v1.20.0 h1:NNpXoyEqIJmZFc0ACcwBEaXnmscUpcG4NkKnbCePmiM=
-cloud.google.com/go/datastore v1.20.0/go.mod h1:uFo3e+aEpRfHgtp5pp0+6M0o147KoPaYNaPAKpfh8Ew=
+cloud.google.com/go/datastore v1.21.0 h1:dUrYq47ysCA4nM7u8kRT0WnbfXc6TzX49cP3TCwIiA0=
+cloud.google.com/go/datastore v1.21.0/go.mod h1:9l+KyAHO+YVVcdBbNQZJu8svF17Nw5sMKuFR0LYf1nY=
 cloud.google.com/go/iam v1.5.2 h1:qgFRAGEmd8z6dJ/qyEchAuL9jpswyODjA2lS+w234g8=
 cloud.google.com/go/iam v1.5.2/go.mod h1:SE1vg0N81zQqLzQEwxL2WI6yhetBdbNQuTvIKCSkUHE=
 cloud.google.com/go/kms v1.23.2 h1:4IYDQL5hG4L+HzJBhzejUySoUOheh3Lk5YT4PCyyW6k=