fix checksum

package_arduinoFabBoards_index.json

 {
   "packages": [
     {
-      "name": "fabBoards",
+      "name": "arduinoabBoards",
       "maintainer": "Will Langford",
       "websiteURL": "https://gitlab.cba.mit.edu/langfordw/arduinoFabBoards",
       "email": "will.langford@cba.mit.edu",
@@ -19,7 +19,7 @@
           },
           "url": "https://gitlab.cba.mit.edu/langfordw/arduinoFabBoards/raw/master/package_arduinoFabBoards_index.zip",
           "archiveFileName": "package_arduinoFabBoards_index.zip",
-          "checksum": "b4486afa86125acacafbb12cd9115b2a4696a60cfdb92ae4019878f51eaf78dd",
+          "checksum": "SHA-256:b4486afa86125acacafbb12cd9115b2a4696a60cfdb92ae4019878f51eaf78dd",
           "size": "11032",
           "boards": [
             {"name": "ATtiny45"},