Documentation issue: Installing Bazel on Fedora and CentOS

Documentation URL: https://docs.bazel.build/versions/5.4.1/install-redhat.html

`vbatts/bazel` is obsolete and not supporting bazel8. You can direct to https://copr.fedorainfracloud.org/coprs/ohadm/bazel/ for a full support

replace:
```
dnf copr enable vbatts/bazel
dnf install bazel4
```

with
```
dnf copr enable ohadm/bazel
dnf install bazel8
```

Open the Fedora and CentOS installation page at https://docs.bazel.build/versions/5.4.1/install-redhat.html and review the commands for enabling the COPR repository and installing Bazel. Update the obsolete repository and package references to the supported ones specified in the issue, then verify the page shows the intended commands.

Written by the indexing model from the issue text.