Update low end requirements to 10.8.0

Author: Rick Butterfield

.github/ISSUE_TEMPLATE/bug.yml

@@ -16,7 +16,7 @@ body:
 - type: input
   id: "umbracoVersion"
   attributes:
-    label: "Which Umbraco version are you using? For example: 10.4.0 - don't just write v10"
+    label: "Which Umbraco version are you using? For example: 10.8.0 - don't just write v10"
     description: "Use the help icon in the Umbraco backoffice to find the version you're using."
   validations:
     required: true

.github/README.md

@@ -21,7 +21,7 @@ On each content page, a Content App is added which allows users to see and bench
 
 ## Installation
 
-Add the package to an existing Umbraco website (v10.4+) from nuget:
+Add the package to an existing Umbraco website (v10.8.0+) from nuget:
 
 `dotnet add package Umbraco.Community.Sustainability`
 

docs/README_nuget.md

@@ -21,7 +21,7 @@ On each content page, a Content App is added which allows users to see and bench
 
 ## Installation
 
-Add the package to an existing Umbraco website (v10.4+) from nuget:
+Add the package to an existing Umbraco website (v10.8.0+) from nuget:
 
 `dotnet add package Umbraco.Community.Sustainability`