chore: set version to v0.8.1

Author: github-actions[bot]

CHANGELOG.md

@@ -0,0 +1,8 @@
+### What's changed in v0.8.1
+
+* fix(deps): update rust crate tar to v0.4.45 (#27) (by @renovate[bot])
+
+  Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
+
+
+See full diff: [v0.8.0...v0.8.1](https://github.com/hops-ops/hops-cli/compare/v0.8.0...v0.8.1)