Update eslint plugin & fix silly indenting

As per https://github.com/matrix-org/eslint-plugin-matrix-org/pull/15
this caused a bunch of silly indenting to creep in, so this fixes it
back to the previous style.

package.json

@@ -153,7 +153,7 @@
     "enzyme": "^3.11.0",
     "eslint": "7.18.0",
     "eslint-config-google": "^0.14.0",
-    "eslint-plugin-matrix-org": "github:matrix-org/eslint-plugin-matrix-org#main",
+    "eslint-plugin-matrix-org": "github:matrix-org/eslint-plugin-matrix-org#2306b3d4da4eba908b256014b979f1d3d43d2945",
     "eslint-plugin-react": "^7.22.0",
     "eslint-plugin-react-hooks": "^4.2.0",
     "glob": "^7.1.6",