Bump cloud.google.com/go/datastore from 1.20.0 to 1.21.0 in /sdks

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]>

Author: dependabot[bot]

sdks/go.mod

@@ -27,7 +27,7 @@ toolchain go1.25.2
 require (
 	cloud.google.com/go/bigquery v1.71.0
 	cloud.google.com/go/bigtable v1.40.1
-	cloud.google.com/go/datastore v1.20.0
+	cloud.google.com/go/datastore v1.21.0
 	cloud.google.com/go/profiler v0.4.3
 	cloud.google.com/go/pubsub v1.50.1
 	cloud.google.com/go/spanner v1.86.1

sdks/go.sum

@@ -243,8 +243,8 @@ cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/datastore v1.10.0/go.mod h1:PC5UzAmDEkAmkfaknstTYbNpgE49HAgW2J1gcgUfmdM=
 cloud.google.com/go/datastore v1.11.0/go.mod h1:TvGxBIHCS50u8jzG+AW/ppf87v1of8nwzFNgEZU1D3c=
-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/datastream v1.2.0/go.mod h1:i/uTP8/fZwgATHS/XFu0TcNUhuA0twZxxQ3EyCUQMwo=
 cloud.google.com/go/datastream v1.3.0/go.mod h1:cqlOX8xlyYF/uxhiKn6Hbv6WjwPPuI9W2M9SAXwaLLQ=
 cloud.google.com/go/datastream v1.4.0/go.mod h1:h9dpzScPhDTs5noEMQVWP8Wx8AFBRyS0s8KWPx/9r0g=