chore: update Minecraft versions (#538)

Co-authored-by: moddermore-bot[bot] <207009453+moddermore-bot[bot]@users.noreply.github.com>

Author: moddermore-bot[bot]

src/lib/minecraftVersions.json

@@ -1,5 +1,6 @@
 {
   "releases": [
+    "1.21.9",
     "1.21.8",
     "1.21.7",
     "1.21.6",
@@ -752,8 +753,8 @@
     "13w38c",
     "13w38b",
     "13w38a",
-    "1.6.3",
     "13w37b",
+    "1.6.3",
     "13w37a",
     "13w36b",
     "13w36a",