chore(license): align package metadata with AGPL

package-lock.json

@@ -7,7 +7,7 @@
         "": {
             "name": "discord-audio-stream",
             "version": "x.x.x",
-            "license": "LGPL-3.0-only",
+            "license": "AGPL-3.0-only",
             "devDependencies": {
                 "@discordjs/opus": "^0.10.0",
                 "@jest/globals": "^30.4.1",

package.json

@@ -2,7 +2,7 @@
     "$schema": "https://json.schemastore.org/package.json",
     "name": "discord-audio-stream",
     "version": "x.x.x",
-    "license": "LGPL-3.0-only",
+    "license": "AGPL-3.0-only",
     "description": "A small Discord voice audio streaming library with managed ffmpeg playback.",
     "exports": {
         ".": {