DOCSP-11590: update Rust compatibility matrix (#665)

Author: Chris Cho

source/includes/mongodb-compatibility-table-rust.rst

@@ -8,18 +8,15 @@
      - MongoDB 4.2
      - MongoDB 4.0
      - MongoDB 3.6
-     - MongoDB 3.4
-     - MongoDB 3.2
-     - MongoDB 3.0
-     - MongoDB 2.6
 
    * - 0.9.x
-     -
+     - |checkmark| (*)
      - |checkmark|
      - |checkmark|
      - |checkmark|
-     -
-     -
-     -
-     -
 
+The Rust driver is not compatible with MongoDB server versions older than 3.6.
+
+(*) Not all features in MongoDB 4.4 are available in this version of the
+driver including OCSP. These features will be included in future versions of
+the driver.

source/includes/mongodb-compatibility-table-swift.rst

@@ -11,7 +11,7 @@
      - MongoDB 3.4
 
    * - 1.0.0
-     - ✓ (*)
+     - |checkmark| (*)
      - |checkmark|
      - |checkmark|
      - |checkmark|