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Try following way:

app/code/SR/MagentoCommunity/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Checkout\CustomerData\DefaultItem">
        <plugin name="sr_DefaultItem"
                type="SR\MagentoCommunity\Plugin\Checkout\CustomerData\DefaultItem" sortOrder="1"/>
    </type>
</config>

app/code/SR/MagentoCommunity/Plugin/Checkout/CustomerData/DefaultItem.php

<?php
namespace SR\MagentoCommunity\Plugin\Checkout\CustomerData;


class DefaultItem
{
    public function afterGetItemData(
        \Magento\Checkout\CustomerData\DefaultItem $subject,
        $item
    ) {

        if (isset($item['options'])) {
            $options = $item['options'];
            foreach ($options as $key => $option) {
                $item['options'][$key]['value'] = html_entity_decode($option['value']);
            }
        }
        
        return $item;
    }
}

Overwrite following template for change render type:

vendor/magento/module-checkout/view/frontend/web/template/minicart/item/default.html

Now modify

<span data-bind="text: option.value"></span>

to

<span data-bind="html: option.value"></span>

Output:

[Update]

Add following code in di.xml

<type name="Magento\Checkout\Model\DefaultConfigProvider">
    <plugin name="st_config_provider"
            type="SR\MagentoCommunity\Plugin\Checkout\Model\DefaultConfigProvider" sortOrder="1"/>
</type>

app/code/SR/MagentoCommunity/Plugin/Checkout/Model/DefaultConfigProvider.php

<?php
namespace SR\MagentoCommunity\Plugin\Checkout\Model;

use Magento\Framework\Serialize\Serializer\Json;

class DefaultConfigProvider
{
    /**
     * @var Json
     */
    private $json;

    /**
     * DefaultConfigProvider constructor.
     * @param Json $json
     */
    public function __construct(
        Json $json
    ) {
        $this->json = $json;
    }

    public function afterGetConfig(
        \Magento\Checkout\Model\DefaultConfigProvider $subject,
        array $result
    ) {

        $items = $result['totalsData']['items'];
        foreach ($items as $index => $item) {
            if (isset($item['options'])) {
                $options = $this->json->unserialize($item['options']);
                foreach ($options as $key => $option) {
                    if (isset($option['full_view'])) {
                        $options[$key]['full_view'] = html_entity_decode($option['full_view']);
                    }
                }
                $item['options'] = $this->json->serialize($options);
                $result['totalsData']['items'][$index] = $item;
            }
        }

        return $result;
    }
}

OR

Add following code in di.xml

<type name="Magento\Quote\Model\Cart\CartTotalRepository">
    <plugin name="checkout_item_sidebar"
            type="SR\MagentoCommunity\Plugin\Quote\Model\Cart\CartTotalRepository" sortOrder="1"/>
</type>

app/code/SR/MagentoCommunity/Plugin/Quote/Model/Cart/CartTotalRepository.php

<?php
namespace SR\MagentoCommunity\Plugin\Quote\Model\Cart;

use Magento\Framework\Serialize\Serializer\Json;

class CartTotalRepository
{
    /**
     * @var Json
     */
    private $json;

    /**
     * DefaultConfigProvider constructor.
     * @param Json $json
     */
    public function __construct(
        Json $json
    ) {
        $this->json = $json;
    }

    public function afterGet(
        \Magento\Quote\Model\Cart\CartTotalRepository $subject,
        $quoteTotals
    ) {
        $quoteItems = $quoteTotals->getItems();
        $items = [];

        /**  @var \Magento\Quote\Model\Cart\Totals\Item $item */
        foreach ($quoteItems as $index => $item) {
            if ($options = $item->getOptions()) {
                $options = $this->json->unserialize($options);
                foreach ($options as $key => $option) {
                    if (isset($option['full_view'])) {
                        $options[$key]['full_view'] = html_entity_decode($option['full_view']);
                    }
                }
                $item->setOptions($this->json->serialize($options));
            }
            $items[$index] = $item;
        }

        $quoteTotals->setItems($items);
        return $quoteTotals;
    }
}