[main] (deps): Bump src/submodules/spa-templates (#42564)

Bumps [src/submodules/spa-templates](https://github.com/dotnet/spa-templates) from `89af41a` to `34c6f4e`.
- [Release notes](https://github.com/dotnet/spa-templates/releases)
- [Commits](https://github.com/dotnet/spa-templates/compare/89af41aa1c0efd4aef83ee51b5c49ab6489f39e8...34c6f4e6a7ad8dcf1de67582233cc02eb69c5308

)

---
updated-dependencies:
- dependency-name: src/submodules/spa-templates
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

spa-templates @ 34c6f4e6

-Subproject commit 89af41aa1c0efd4aef83ee51b5c49ab6489f39e8
+Subproject commit 34c6f4e6a7ad8dcf1de67582233cc02eb69c5308