build(deps): Bump github.com/celestiaorg/rsmt2d from 0.5.0 to 0.6.0 (#809)

Bumps [github.com/celestiaorg/rsmt2d](https://github.com/celestiaorg/rsmt2d) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/celestiaorg/rsmt2d/releases)
- [Commits](celestiaorg/rsmt2d@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: github.com/celestiaorg/rsmt2d
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Evan Forbes <42654277+evan-forbes@users.noreply.github.com>

Author: dependabot[bot]

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/btcsuite/btcd v0.21.0-beta
 	github.com/btcsuite/btcutil v1.0.2
 	github.com/celestiaorg/nmt v0.10.0
-	github.com/celestiaorg/rsmt2d v0.5.0
+	github.com/celestiaorg/rsmt2d v0.6.0
 	github.com/fortytw2/leaktest v1.3.0
 	github.com/go-kit/kit v0.12.0
 	github.com/go-kit/log v0.2.1