Updated Kali Linux Installation and Uninstallation (#2973)

* Updated Kali Linux Installation and Uninstallation

Updated the Installation and Uninstallation Bash commands for Kali Linux distro to address the issue #2901.

Tested the steps in Kali Linux on Windows Subsystem for Linux (WSL) on the following version:
```sh
$ sudo cat /etc/os-release
PRETTY_NAME="Kali GNU/Linux Rolling"
NAME="Kali GNU/Linux"
ID=kali
VERSION="2018.3"
VERSION_ID="2018.3"
ID_LIKE=debian
ANSI_COLOR="1;31"
HOME_URL="https://www.kali.org/"
SUPPORT_URL="https://forums.kali.org/"
BUG_REPORT_URL="https://bugs.kali.org/"
```

```sh
$ pwsh
PowerShell 6.1.0
Copyright (c) Microsoft Corporation. All rights reserved.

https://aka.ms/pscore6-docs
Type 'help' to get help.

PS /> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      6.1.0
PSEdition                      Core
GitCommitId                    6.1.0
OS                             Linux 4.4.0-43-Microsoft #1-Microsoft Wed Dec 31 14:42:53 PST 2014
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

PS /> Get-Content -Path /etc/os-release
PRETTY_NAME="Kali GNU/Linux Rolling"
NAME="Kali GNU/Linux"
ID=kali
VERSION="2018.3"
VERSION_ID="2018.3"
ID_LIKE=debian
ANSI_COLOR="1;31"
HOME_URL="https://www.kali.org/"
SUPPORT_URL="https://forums.kali.org/"
BUG_REPORT_URL="https://bugs.kali.org/"
```

* Included apt-get update

Added `apt-get update` to update packages list before `apt-get install`

* Removed note for Kali install

Author: kiazhi

reference/docs-conceptual/setup/Installing-PowerShell-Core-on-Linux.md

@@ -579,19 +579,22 @@ sudo snap remove powershell-preview
 
 ## Kali
 
-> [!NOTE]
-> Kali support is not currently working. Please use the [Snap package][snap] instead.
-
 ### Installation
 
 ```sh
 # Download & Install prerequisites
-sudo apt-get install libunwind8 libicu55
-wget http://security.debian.org/debian-security/pool/updates/main/o/openssl/libssl1.0.0_1.0.1t-1+deb8u6_amd64.deb
-sudo dpkg -i libssl1.0.0_1.0.1t-1+deb8u6_amd64.deb
+wget http://ftp.us.debian.org/debian/pool/main/i/icu/libicu57_57.1-9_amd64.deb
+dpkg -i libicu57_57.1-9_amd64.deb
+apt-get update && apt-get install -y curl gnupg apt-transport-https
 
-# Install PowerShell
-sudo dpkg -i powershell_6.1.0-1.ubuntu.16.04_amd64.deb
+# Add Microsoft public repository key to APT
+curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
+
+# Add Microsoft package repository to the source list
+echo "deb [arch=amd64] https://packages.microsoft.com/repos/microsoft-debian-stretch-prod stretch main" | tee /etc/apt/sources.list.d/powershell.list
+
+# Install PowerShell package
+apt-get update && apt-get install -y powershell
 
 # Start PowerShell
 pwsh
@@ -600,7 +603,8 @@ pwsh
 ### Uninstallation - Kali
 
 ```sh
-sudo dpkg -r powershell_6.0.2-1.ubuntu.16.04_amd64.deb
+# Uninstall PowerShell package
+apt-get remove -y powershell
 ```
 
 ## Raspbian