nix: bump hls-src from 82a7d79 to b7e5d25 in the nix group (#26)

Bumps the nix group with 1 update: [hls-src](https://github.com/haskell/haskell-language-server).


Updates `hls-src` from `82a7d79` to `b7e5d25`
- [Release notes](https://github.com/haskell/haskell-language-server/releases)
- [Commits](haskell/haskell-language-server@82a7d79...b7e5d25)

---
updated-dependencies:
- dependency-name: hls-src
  dependency-version: b7e5d25260f7a8ff5df4590bfb2b3a683ac07d42
  dependency-type: direct:production
  dependency-group: nix
...

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Author: dependabot[bot]