fix(docs): make Linux tar log-collection commands actually work

Closes #16.

The Linux tar commands in 'Gathering Warp Logs' fail with 'tar: warp.log*:
Cannot stat: No such file or directory' on Linux: bash leaves the
unmatched literal 'warp.log*' as the file argument to tar, and tar then
looks for a literal file named 'warp.log*' inside the -C directory.

Switch to 'cd into the directory first, then tar' so the shell expands
the glob in the right pwd. Wrap the cd+tar in subshell parens so the
user's pwd is preserved after the command finishes (the cd only affects
the subshell).

Verified with GNU tar 1.35 + bash:
  - OLD command reproduces the reporter's failure (exit=2,
    'Cannot stat: No such file or directory').
  - NEW command exits 0 and archives warp.log, warp.log.1, warp.log.2.
  - Caller's pwd is unchanged after the subshell exits.

(Earlier draft of this fix used GNU tar's --wildcards flag, but
--wildcards only enables glob matching during EXTRACTION/listing; in
creation mode tar still treats arguments as literal paths. Reverted
to the cd-then-tar approach the issue reporter suggested.)

Also normalize the indentation in the Linux :::caution RUST_LOG block
to the 4-space indent already used by the macOS and Windows tabs.

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: hongyi-chen

src/content/docs/support-and-community/troubleshooting-and-support/sending-us-feedback.mdx

@@ -158,27 +158,27 @@ Warp's logs and crash reports _**do not**_ contain any console input or output.
     Run the following to zip the Warp logs to your home directory:
 
     ```bash
-    tar -czf ~/warp-logs.tar.gz -C ~/.local/state/warp-terminal warp.log*
+    (cd ~/.local/state/warp-terminal && tar -czf ~/warp-logs.tar.gz warp.log*)
     ```
 
     **Warp Preview logs on Linux**
 
     Run the following to zip the Warp Preview logs to your home directory:
 
     ```bash
-    tar -czf ~/warp_preview-logs.tar.gz -C ~/.local/state/warp-terminal-preview warp_preview.log*
+    (cd ~/.local/state/warp-terminal-preview && tar -czf ~/warp_preview-logs.tar.gz warp_preview.log*)
     ```
 
     :::caution
     If your issue is graphical (e.g. no display of windows) or a crash, please run Warp with the following command to capture more log information:
 
     ```bash
-# Run if Warp on Linux is installed
+    # Run if Warp on Linux is installed
     RUST_LOG=wgpu_core=info,wgpu_hal=info MESA_DEBUG=1 EGL_LOG_LEVEL=debug warp-terminal
-    
+
     # Run if Warp Preview on Linux is installed
     RUST_LOG=wgpu_core=info,wgpu_hal=info MESA_DEBUG=1 EGL_LOG_LEVEL=debug warp-terminal-preview
-```
+    ```
     :::
   </TabItem>
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