[main] (deps): Bump src/submodules/spa-templates (#36459)

Bumps [src/submodules/spa-templates](https://github.com/dotnet/spa-templates) from `796e436` to `a64c11d`.
- [Release notes](https://github.com/dotnet/spa-templates/releases)
- [Commits](dotnet/spa-templates@796e436...a64c11d)

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

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]