Fix License type to match included license

license was listed as misspelled `GPL-3.0` as `GLP-3.0` but this package is distributed under the Affero GPL 3.0 so it has now been corrected to `AGPL-3.0`

dappnode_package.json

@@ -31,5 +31,5 @@
     "homepage": "https://rotki.com/",
     "readme": "https://github.com/dappnode/DAppNodePackage-rotki"
   },
-  "license": "GLP-3.0"
+  "license": "AGPL-3.0"
 }