[BUG] Publisher adding characters when API specification contains ° or ³

### Release version

APIOps Toolkit for Azure APIM v5.1.4

### Describe the bug

When publishing an API specification that contains ° or ³, the final result of our schema definitions contains `°C` instead of `°C` and `³` instead of `³`.

Our specification.yaml file contains the following lines:

components:

  schemas:

    Conditions:

      type: object

      properties:

        temperature:

          type: number

          description: Temperature (°C)

        gasContent:

          type: number

          description: Content of gas (mg/Nm³)

      description: Conditions

which results in a definition in APIM with schema:

{

    "type": "object",

    "properties": {

        "temperature": {

            "type": "number",

            "description": "Temperature (°C)"

        },

        "gasContent": {

            "type": "number",

            "description": "Content of gas (mg/Nm³)"

        }

    },

    "description": "Conditions"

}

### Expected behavior

When providing a specification that contains `°` or `³`, the schema published in API Management contains `°` and `³` without any additional characters.

### Actual behavior

When providing a specification that contains `°` or `³`, the schema published in API Management contains `°` and `³`.

### Reproduction Steps

Publish an API specification with a schema that contains a special character such as `°` or `3`.

Inizia riproducendo il problema con la specification.yaml fornita tramite APIOps Toolkit for Azure APIM v5.1.4, quindi traccia il modo in cui il publisher gestisce il testo dello schema e la codifica dei caratteri. Il lavoro è completato quando le descrizioni dello schema pubblicate preservano ° e ³ senza aggiungere Â.

Scritto dal modello di indicizzazione a partire dal testo della issue.