feat: add Nginx Config Upgrade issue template

Author: yCodeTech

.github/ISSUE_TEMPLATE/nginx-config-upgrade.md

@@ -0,0 +1,17 @@
+---
+name: Nginx Config Upgrade
+about: Report an Nginx configuration upgrade issue.
+title: 'Nginx config upgrade: [option name here]'
+labels: nginx upgrade
+assignees: yCodeTech
+
+---
+
+## Describe
+Please describe the configuration option that needs to be upgraded.
+
+## The Error or Warning
+Please paste the error/warning message displayed in the terminal.
+
+## Valet Diagnose
+Please run the `valet diagnose` command and paste the output that was automatically copied to the clipboard. This will include all information about your system, your Valet configs, and Valet service versions, including Nginx.