chore(deps): update dependency zitadel to v5.3.0 (#19)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [Zitadel](https://togithub.com/smartive/zitadel-net) | `5.2.26` ->
`5.3.0` |
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|
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|
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|
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|

---

### Release Notes

<details>
<summary>smartive/zitadel-net (Zitadel)</summary>

###
[`v5.3.0`](https://togithub.com/smartive/zitadel-net/releases/tag/v5.3.0)

##### Features

- add option for insecure service account authentication
([#&#8203;848](https://togithub.com/smartive/zitadel-net/issues/848))
([341b912](https://togithub.com/smartive/zitadel-net/commit/341b912cfad0b4f407e4a9e6a9dd09165769e216))

</details>

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MumbleApi/MumbleApi.csproj

@@ -20,7 +20,7 @@
       <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
       <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="6.5.0" />
       <PackageReference Include="Ulid" Version="1.3.3" />
-      <PackageReference Include="Zitadel" Version="5.2.26" />
+      <PackageReference Include="Zitadel" Version="5.3.0" />
     </ItemGroup>
 
     <ItemGroup>