chore: update Minecraft versions (#534)

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

Author: moddermore-bot[bot]

src/lib/minecraftVersions.json

@@ -97,6 +97,7 @@
     "1.0"
   ],
   "snapshots": [
+    "1.21.9-rc1",
     "1.21.9-pre4",
     "1.21.9-pre3",
     "1.21.9-pre2",
@@ -751,8 +752,8 @@
     "13w38c",
     "13w38b",
     "13w38a",
-    "13w37b",
     "1.6.3",
+    "13w37b",
     "13w37a",
     "13w36b",
     "13w36a",