readme: format tables

Author: love-linger

README.md

@@ -43,11 +43,11 @@ You can download the latest stable from [Releases](https://github.com/sourcegit-
 
 This software creates a folder `$"{System.Environment.SpecialFolder.ApplicationData}/SourceGit"`, which is platform-dependent, to store user settings, downloaded avatars and crash logs. 
 
-| OS | PATH |
-| --- | --- |
-| Windows | `C:\Users\USER_NAME\AppData\Roaming\SourceGit` |
-| Linux | `${HOME}/.config/SourceGit` |
-| macOS | `${HOME}/Library/Application Support/SourceGit` |
+| OS      | PATH                                            |
+|---------|-------------------------------------------------|
+| Windows | `C:\Users\USER_NAME\AppData\Roaming\SourceGit`  |
+| Linux   | `${HOME}/.config/SourceGit`                     |
+| macOS   | `${HOME}/Library/Application Support/SourceGit` |
 
 For **Windows** users:
 
@@ -74,13 +74,13 @@ For **Linux** users:
 
 This app supports open repository in external tools listed in the table below.
 
-| Tool | Windows | macOS | Linux | Environment Variable |
-| --- | --- | --- | --- | --- |
-| Visual Studio Code | YES | YES | YES | VSCODE_PATH |
-| Visual Studio Code - Insiders | YES | YES | YES | VSCODE_INSIDERS_PATH |
-| VSCodium | YES | YES | YES | VSCODIUM_PATH |
-| JetBrains Fleet | YES | YES | YES | FLEET_PATH |
-| Sublime Text | YES | YES | YES | SUBLIME_TEXT_PATH |
+| Tool                          | Windows | macOS | Linux | Environment Variable |
+|-------------------------------|---------|-------|-------|----------------------|
+| Visual Studio Code            | YES     | YES   | YES   | VSCODE_PATH          |
+| Visual Studio Code - Insiders | YES     | YES   | YES   | VSCODE_INSIDERS_PATH |
+| VSCodium                      | YES     | YES   | YES   | VSCODIUM_PATH        |
+| JetBrains Fleet               | YES     | YES   | YES   | FLEET_PATH           |
+| Sublime Text                  | YES     | YES   | YES   | SUBLIME_TEXT_PATH    |
 
 * You can set the given environment variable for special tool if it can NOT be found by this app automatically. 
 * Installing `JetBrains Toolbox` will help this app to find other JetBrains tools installed on your device.