extensions: bump libra to v0.2.1

Adds lifetime income/expense totals to the /api/v1/balance response
so clients can render an Income vs Expenses breakdown alongside the
net balance.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extensions.json

@@ -225,6 +225,16 @@
             "archive": "https://git.atitlan.io/aiolabs/libra/archive/v0.2.0.zip",
             "hash": "c40d6378c012358ce1acf6c7d0957a44f04282c68401648b41637005d37ed5f8"
         },
+        {
+            "id": "libra",
+            "repo": "https://git.atitlan.io/aiolabs/libra",
+            "name": "Libra",
+            "version": "0.2.1",
+            "short_description": "Double-entry accounting for collectives",
+            "icon": "https://git.atitlan.io/aiolabs/libra/raw/branch/main/static/image/libra.png",
+            "archive": "https://git.atitlan.io/aiolabs/libra/archive/v0.2.1.zip",
+            "hash": "fe0041e11432e671187988d235d19c9dc3608b5a6a023969eeb8c0800c0962f7"
+        },
         {
             "id": "lnurlp",
             "repo": "https://github.com/lnbits/lnurlp",