[release/7.0] (deps): Bump src/submodules/spa-templates (#43692)

Bumps [src/submodules/spa-templates](https://github.com/dotnet/spa-templates) from `1edf19d` to `ec91da8`.
- [Release notes](https://github.com/dotnet/spa-templates/releases)
- [Commits](dotnet/spa-templates@1edf19d...ec91da8)

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

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