Merge pull request #23 from keisku/release-v0.8.0

Use `v0.8.0` in README

Author: keisku

README.md

@@ -94,7 +94,7 @@ Download the binary from [GitHub Releases](https://github.com/keisku/kubectl-exp
 ```shell
 # Other available architectures are linux_arm64, darwin_amd64, darwin_arm64, windows_amd64.
 export ARCH=linux_amd64
-export VERSION=v0.7.2
+export VERSION=v0.8.0
 wget -O- "https://github.com/keisku/kubectl-explore/releases/download/${VERSION}/kubectl-explore_${VERSION}_${ARCH}.tar.gz" | sudo tar -xzf - -C /usr/local/bin && sudo chmod +x /usr/local/bin/kubectl-explore
 ```