Merge pull request adafruit#16 from adafruit/kattni-bundle-name-update

updated bundle naming to match 3.0.0 final release

Author: dhalbert

circuitpython_build_tools/target_versions.py

@@ -23,6 +23,6 @@
 # THE SOFTWARE.
 
 VERSIONS = [
-    {"tag": "2.3.1", "name": "2.3.1"},
-    {"tag": "3.0.0-beta.0", "name": "3.0.0-beta.0"},
+    {"tag": "2.x", "name": "2.x"},
+    {"tag": "3.x", "name": "3.x"},
 ]