@chore(release): bump version to 3.8.0 (issue #111)

Game-creation wizard: replace /newsession text template with step-by-step
inline-keyboard flow for single games and game pools.

- Directory.Build.props: 3.7.1 -> 3.8.0
- compose.yaml: pin bot, discord-bot and web images to 3.8.0
- deploy.yml VERSION env: 3.7.1 -> 3.8.0
- NavMenu.razor: nav-version 3.7.1 -> 3.8.0

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.gitea/workflows/deploy.yml

@@ -6,7 +6,7 @@ on:
       - main 
 
 env:
-  VERSION: 3.7.1
+  VERSION: 3.8.0
 
 jobs:
   # ЧАСТЬ 1: Собираем образы и кладем в Gitea (чтобы делиться с ребятами)