fix(docs): update init examples (#43)

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## Description
<!--- Describe your changes in detail -->
Update init examples with usage of the configuration utility.

## Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here. -->
The init examples were outdated

## Types of changes
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- [ ] 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 not work as expected)
- [ ] Other changes (ci configuration, documentation or any other kind of changes)

## Checklist:
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- [ ] I have created tests for my code changes, and the tests are passing.
- [ ] I have executed the pre-commit hooks locally.
- [ ] My change requires a change to the documentation (create a new issue if the documentation has not been updated).
- [ ] I have updated the documentation accordingly.

content/v2/docs/60_kais_runner_sdk/10_sdk/_index.md

@@ -20,7 +20,8 @@ import joblib
 
 async def init(ctx):
   ctx.logger.info("[worker init]")
-  ctx.set('model', joblib.load(ctx.path('models/model.joblib')))
+
+  ctx.configuration.set('model', joblib.load(ctx.path('models/model.joblib')))
 ```
 
 ### Golang init example
@@ -33,10 +34,10 @@ import (
 )
 
 func handlerInit(ctx *kre.HandlerContext) {
-  ctx.Logger.Info("init handler")
-    
-  // Saves a value in the context internal registry
-  ctx.Set("greeting", "Hello")   
+  ctx.Logger.Info("worker init")
+
+  address := fakeModelLoader(ctx.Path("models/model.joblib"))
+  ctx.Configuration.Set("model", address)   
 }
 ```