refactor: Rename "Embedded Style" to "Book's Embedded Style" (#746)

## Summary

**What is the goal of this PR?**
- Just a simple rename after feedback in #738

**What changes are included?**
- Renamed "Embedded Style" to "Book's Embedded Style" to more clearly
associate it with "Book's Style" option in "Paragraph Alignment"
settings

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**NO**_

src/activities/settings/SettingsActivity.cpp

@@ -43,7 +43,7 @@ const SettingInfo readerSettings[readerSettingsCount] = {
     SettingInfo::Value("Screen Margin", &CrossPointSettings::screenMargin, {5, 40, 5}),
     SettingInfo::Enum("Paragraph Alignment", &CrossPointSettings::paragraphAlignment,
                       {"Justify", "Left", "Center", "Right", "Book's Style"}),
-    SettingInfo::Toggle("Embedded Style", &CrossPointSettings::embeddedStyle),
+    SettingInfo::Toggle("Book's Embedded Style", &CrossPointSettings::embeddedStyle),
     SettingInfo::Toggle("Hyphenation", &CrossPointSettings::hyphenationEnabled),
     SettingInfo::Enum("Reading Orientation", &CrossPointSettings::orientation,
                       {"Portrait", "Landscape CW", "Inverted", "Landscape CCW"}),