Rename to "The Internals of Spark Core" as a more proper name

README.md

@@ -1,5 +1,5 @@
-# The Internals of Apache Spark Online Book
+# The Internals of Spark Core Online Book
 
 [![CI](https://github.com/japila-books/apache-spark-internals/workflows/CI/badge.svg)](https://github.com/japila-books/apache-spark-internals/actions)
 
-The project contains the sources of [The Internals of Apache Spark](https://books.japila.pl/apache-spark-internals) online book.
+The project contains the sources of [The Internals of Spark Core](https://books.japila.pl/apache-spark-internals) online book.

docs/index.md

@@ -1,12 +1,12 @@
 ---
-title: Apache Spark
+title: Spark Core
 icon: material/home
 hide:
   - toc
   - navigation
 ---
 
-# The Internals of {{ book.title }} {{ spark.version }}
+# The Internals of {{ book.title }} (Apache Spark {{ spark.version }})
 
 Welcome to **The Internals of {{ book.title }}** online book! 🤙
 

mkdocs.yml

@@ -1,7 +1,7 @@
-site_name: The Internals of Apache Spark
+site_name: The Internals of Spark Core
 site_url: https://books.japila.pl/apache-spark-internals
 site_author: Jacek Laskowski
-site_description: Demystifying inner-workings of Apache Spark
+site_description: Demystifying inner-workings of Spark Core
 
 repo_name: spark-internals
 repo_url: https://github.com/japila-books/apache-spark-internals
@@ -95,7 +95,7 @@ extra:
     provider: google
     property: !ENV GOOGLE_ANALYTICS_KEY
   book:
-    title: Apache Spark
+    title: Spark Core
     pyspark: https://books.japila.pl/pyspark-internals
     spark_k8s: https://jaceklaskowski.github.io/spark-kubernetes-book
     spark_sql: https://books.japila.pl/spark-sql-internals