chore: move from HTML_text styles to HTML-text in examples

  <h2>Inline Custom Styles</h2>

  <div class="example-container">

    <div>

      [some text]{.HTML_Code}<br/>

      [some text]{.HTML_Sample}<br/>

      [some text]{.HTML_Variable}<br/>

      [some text]{.HTML_Keyboard}<br/>

      [some text]{.HTML_Definition}<br/>

      [some text]{.HTML_Error}<br/>

      [some text]{.HTML-Code}<br/>

      [some text]{.HTML-Sample}<br/>

      [some text]{.HTML-Variable}<br/>

      [some text]{.HTML-Keyboard}<br/>

      [some text]{.HTML-Definition}<br/>

      [some text]{.HTML-Error}<br/>

      [some text]{.NF}<br/>

    </div>

    <div>

    <div>

      >>> [!tip] EXAMPLE 11:<br>

      <br>

      [?q=parkingTickets\[value\]=="Overstay 60 minutes"&jsonKeys=parkingTickets]{.HTML_Code} . The trailing path is [parkingTickets]{.HTML_Code} . The [parkingTickets]{.HTML_Code} *Property* of the JSON object is targeted, but the target [value]{.HTML_Code} raw is JSON, and is not expanded to [ngsi-ld:hasValue]{.HTML_Code} using the core *\@context* . Refer to the following NGSI-LD Entity:<br>

      [?q=parkingTickets\[value\]=="Overstay 60 minutes"&jsonKeys=parkingTickets]{.HTML-Code} . The trailing path is [parkingTickets]{.HTML-Code} . The [parkingTickets]{.HTML-Code} *Property* of the JSON object is targeted, but the target [value]{.HTML-Code} raw is JSON, and is not expanded to [ngsi-ld:hasValue]{.HTML-Code} using the core *\@context* . Refer to the following NGSI-LD Entity:<br>

      ``` json<br>

      {<br>

        "id": "urn:ngsi-ld:Car:6152s",<br>