project: rearrange ISSUE_TEMPLATE/bug_report.yml

Problem:
The "system info" fields in the bug report take up a lot of space at the
top. That hides the most relevant part of the bug report. To read the
actual bug, you always have to scroll down.

Solution:
Move the "system info" fields to the bottom.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -8,6 +8,33 @@ body:
       value: |
         _Before reporting:_ search [existing issues](https://github.com/neovim/neovim/issues?q=is%3Aissue+is%3Aopen+label%3Abug) and check the [FAQ](https://github.com/neovim/neovim/wiki/FAQ). Usage questions such as "How do I...?" belong on the [Neovim Discourse](https://neovim.discourse.group/c/7-category/7) and will be closed.
 
+  - type: textarea
+    attributes:
+      label: "Describe the bug"
+      description: "Describe the current behavior. May include logs, images, or videos."
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: "Steps to reproduce"
+      description: |
+        - For build failures: list the exact steps including CMake flags (if any).
+        - For startup or shell-related problems: try `env -i TERM=ansi-256color "$(which nvim)"`.
+      placeholder: |
+        nvim --clean
+        :edit foo
+        yiwp
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: "Expected behavior"
+      description: "Describe the behavior you expect."
+    validations:
+      required: true
+
   - type: input
     attributes:
       label: "Neovim version (nvim -v)"
@@ -47,29 +74,3 @@ body:
       placeholder: "Arch User Repository (AUR)"
     validations:
       required: true
-
-  - type: textarea
-    attributes:
-      label: "How to reproduce the issue"
-      description: |
-        - Steps to reproduce using `nvim --clean` ("factory defaults").
-        - For build failures: list the exact steps including CMake flags (if any).
-        - For shell-related problems: try `env -i TERM=ansi-256color "$(which nvim)"`.
-      placeholder: |
-        nvim --clean
-        :edit foo
-        yiwp
-    validations:
-      required: true
-
-  - type: textarea
-    attributes:
-      label: "Expected behavior"
-      description: "Describe the behavior you expect. May include logs, images, or videos."
-    validations:
-      required: true
-  - type: textarea
-    attributes:
-      label: "Actual behavior"
-    validations:
-      required: true