docs: Update GitHub ISSUE_TEMPLATE (#3366)

Co-authored-by: Matan Kushner <hello@matchai.dev>

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -9,12 +9,12 @@ assignees: ''
 
 <!--
 ─────────────────────────────────────────────
-                                ⚠️ IMPORTANT: Please run the following command to create an issue:
+  ⚠️ IMPORTANT: Please run the following command to create an issue:
 
-                                                                            starship bug-report
+  starship bug-report
 
-                                      An issue will be pre-populated with your system's configuration, 
-                                                          making the process a whole lot quicker 😊
+  An issue will be pre-populated with your system's configuration,
+  making the process a whole lot quicker 😊
 ─────────────────────────────────────────────
 -->
 
@@ -36,24 +36,30 @@ assignees: ''
 - Starship version: [the output of `starship --version`]
 - Shell type: [fish, zsh]
 - Shell version: [the output of `fish --version` or `zsh --version`]
-- Shell plugin manager: [e.g. oh-my-fish, oh-my-zsh, fisher, antigen]
+- Shell plugin manager: [if present, e.g. oh-my-fish, oh-my-zsh, fisher, antigen]
 - Terminal emulator: [e.g. iTerm, Hyper, Terminator]
 - Operating system: [e.g. macOS 10.13.4, Windows 10]
 
 #### Relevant Shell Configuration
 <!-- 
   Based on the shell you use, please paste the appropriate configuration.
-    Fish users: ~/.config/fish/config.fish
-    Zsh users: ~/.zshrc
+  The default location for your shell is:
+    Bash: ~/.bashrc
+    Zsh: ~/.zshrc
+    Fish: ~/.config/fish/config.fish
+    Xonsh: ~/.config/xonsh/rc.xsh
+    Elvish: ~/.config/elvish/rc.elv
+    Nushell: ~/.config/nu/config.toml
+    Ion: ~/.config/ion/initrc
 -->
 
-```bash
+```
 # Your configuration here
 ```
 
 #### Starship Configuration
 <!-- Can be found in  ~/.config/starship.toml -->
 
-```bash
+```toml
 # Your configuration here
 ```