Upgrade project version and kotlin-sdk dependency to 0.8.0 in samples. (#425)

## Motivation and Context
Prepare for next develoment version

## How Has This Been Tested?
Regression tests

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update
- [x] CI update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
<!-- Add any other context, implementation notes, or design decisions
-->

samples/kotlin-mcp-client/gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 anthropic = "2.9.0"
 kotlin = "2.2.21"
 ktor = "3.2.3"
-mcp-kotlin = "0.7.7"
+mcp-kotlin = "0.8.0"
 shadow = "9.2.2"
 slf4j = "2.0.17"
 

samples/kotlin-mcp-server/gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 kotlin = "2.2.21"
 ktor = "3.2.3"
-mcp-kotlin = "0.7.7"
+mcp-kotlin = "0.8.0"
 slf4j = "2.0.17"
 shadow = "9.2.2"
 

samples/weather-stdio-server/gradle/libs.versions.toml

@@ -4,7 +4,7 @@ coroutines = "1.10.2"
 kotlin = "2.2.21"
 ktor = "3.2.3"
 logging = "7.0.13"
-mcp-kotlin = "0.7.7"
+mcp-kotlin = "0.8.0"
 shadow = "9.2.2"
 slf4j = "2.0.17"