DOCSP-32358: add information about component compatibility tables (#899)

* DOCSP-32358: add information about component compatibility tables

Author: Chris Cho

source/about-compatibility.txt

@@ -28,10 +28,13 @@ The check marks (✓) indicate that the driver can access **all the
 features** of that specific version of MongoDB server unless those features
 have been deprecated or removed.
 
-If you are **upgrading your server version**, your current driver should
-continue to function properly, but may not be able to access the features
-introduced in the newer server versions. We recommend using the newest
-compatible driver when upgrading your server version.
+The circled asterisks (⊛) indicate that the driver version works with
+that specific version of MongoDB server, but may not be able to access all
+the features.
+
+If you are **upgrading your server version**, check whether your current driver
+version is compatible. We recommend using the newest compatible driver when
+upgrading your server version.
 
 If you are **upgrading your driver version**, you can use the table to
 identify which version you need to access all the newest features included
@@ -58,3 +61,16 @@ labeled with major release versions of the driver.
 
 The check marks (✓) indicate that the code in the driver is fully
 compatible with the version of the language.
+
+Component Compatibility Tables
+------------------------------
+
+In the **Component Compatibility** tables, the columns indicate versions of
+the driver, and the rows indicate the component package names.
+
+The table cells indicate which versions of the component packages are
+compatible with the driver version specified in that column.
+
+If the table cell value is blank, the component package is incompatible with
+the version of the driver version specified in that column.
+