ISSUE_TEMPLATE: 'nix run' -> 'nix-shell -p'

'nix run' is an experimental command.

Changed files
+2 -2
.github
+1 -1
.github/ISSUE_TEMPLATE.md
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## Technical details
-
Please run `nix run nixpkgs.nix-info -c nix-info -m` and paste the result.
+
Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.
+1 -1
.github/ISSUE_TEMPLATE/bug_report.md
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Add any other context about the problem here.
**Metadata**
-
Please run `nix run nixpkgs.nix-info -c nix-info -m` and paste the result.
+
Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.
Maintainer information:
```yaml