EOL dotnet 6.0 version bump (#321)

Author: Kaniska244

src/dotnet-mssql/devcontainer-template.json

@@ -1,6 +1,6 @@
 {
     "id": "dotnet-mssql",
-    "version": "3.4.0",
+    "version": "3.5.0",
     "name": "C# (.NET) and MS SQL",
     "description": "Develop C# and .NET Core based applications. Includes all needed SDKs, extensions, dependencies and an MS SQL container for parallel database development. Adds an additional MS SQL container to the C# (.NET Core) container definition and deploys any .dacpac files from the mssql .devcontainer folder.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/dotnet-mssql",

src/dotnet-postgres/devcontainer-template.json

@@ -1,6 +1,6 @@
 {
     "id": "dotnet-postgres",
-    "version": "3.3.0",
+    "version": "3.4.0",
     "name": "C# (.NET) and PostgreSQL",
     "description": "Develop C# and .NET Core based applications. Includes all needed SDKs, extensions, dependencies and a PostgreSQL container for parallel database development. Adds an additional PostgreSQL container to the C# (.NET Core) container definition.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/dotnet-postgres",

src/dotnet/devcontainer-template.json

@@ -1,6 +1,6 @@
 {
     "id": "dotnet",
-    "version": "3.3.0",
+    "version": "3.4.0",
     "name": "C# (.NET)",
     "description": "Develop C# and .NET based applications. Includes all needed SDKs, extensions, and dependencies.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/dotnet",