Update module github.com/pulumi/pulumi-java/pkg to v1.21.3 (#791)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[github.com/pulumi/pulumi-java/pkg](https://redirect.github.com/pulumi/pulumi-java)
| require | patch | `v1.21.2` -> `v1.21.3` |

---

### Release Notes

<details>
<summary>pulumi/pulumi-java
(github.com/pulumi/pulumi-java/pkg)</summary>

###
[`v1.21.3`](https://redirect.github.com/pulumi/pulumi-java/blob/HEAD/CHANGELOG.md#vv1213---2026-03-11)

[Compare
Source](https://redirect.github.com/pulumi/pulumi-java/compare/v1.21.2...v1.21.3)

</details>

---

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---

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go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/pulumi/providertest v0.6.0
 	github.com/pulumi/pulumi-dotnet/pulumi-language-dotnet/v3 v3.101.2
 	github.com/pulumi/pulumi-go-provider v1.3.0
-	github.com/pulumi/pulumi-java/pkg v1.21.2
+	github.com/pulumi/pulumi-java/pkg v1.21.3
 	github.com/pulumi/pulumi/pkg/v3 v3.225.1
 	github.com/pulumi/pulumi/sdk/v3 v3.225.1
 	github.com/regclient/regclient v0.7.1