update Modrinth Hosting issue template + misc comments (#5166)

.github/ISSUE_TEMPLATE/3-hosting-bug.yml

@@ -1,6 +1,6 @@
-name: 👥 Bug with Modrinth Servers
-description: For issues with a Modrinth Servers product.
-labels: [servers]
+name: 👥 Bug with Modrinth Hosting
+description: For issues with a Modrinth Hosting product.
+labels: [hosting]
 type: 'bug'
 body:
   - type: checkboxes

.github/ISSUE_TEMPLATE/5-feature-request.yml

@@ -19,7 +19,7 @@ body:
       options:
         - Modrinth App
         - Modrinth.com website
-        - Modrinth Servers
+        - Modrinth Hosting
         - Modrinth API for developers
   - type: textarea
     attributes: