docs: link to discussions instead of stackoverflow

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,5 +1,5 @@
 name: Bug Report
-description: Report a problem in Neovim
+description: Report a problem in Nvim
 labels: [bug]
 body:
 
@@ -43,7 +43,7 @@ body:
 
   - type: input
     attributes:
-      label: "Neovim version (nvim -v)"
+      label: "Nvim version (nvim -v)"
       placeholder: "0.6.0 commit db1b0ee3b30f"
     validations:
       required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,5 @@
 blank_issues_enabled: false
 contact_links:
   - name: Question
-    url: https://vi.stackexchange.com/
+    url: https://github.com/neovim/neovim/discussions
-    about: Ask questions about configuration and usage of Neovim
+    about: Ask about configuration and usage of Nvim

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -1,5 +1,5 @@
 name: Feature request
-description: Request an enhancement for Neovim
+description: Request an enhancement for Nvim
 labels: [enhancement]
 body:
 

.github/ISSUE_TEMPLATE/lsp_bug_report.yml

@@ -1,5 +1,5 @@
 name: Language server (LSP) client bug
-description: Report an issue with Neovim LSP
+description: Report an issue with Nvim LSP
 title: "LSP: "
 labels: [bug, lsp]
 body:
@@ -60,7 +60,7 @@ body:
 
   - type: input
     attributes:
-      label: "Neovim version (nvim -v)"
+      label: "Nvim version (nvim -v)"
       placeholder: "0.6.0 commit db1b0ee3b30f"
     validations:
       required: true