Updated API URI

Necessary to switch to our main domain because nothing is automated for `trmnl.app` and always is behind the changes found on `usetrmnl.com`. This'll help reduce confusion and allow for updates to be tested more quickly for this project.

Milestone: minor

lib/trmnl/api/configuration/loader.rb

@@ -13,7 +13,7 @@ module TRMNL
         def call
           model[
             content_type: environment.fetch("TRMNL_API_CONTENT_TYPE", "application/json"),
-            uri: environment.fetch("TRMNL_API_URI", "https://trmnl.app/api")
+            uri: environment.fetch("TRMNL_API_URI", "https://usetrmnl.com/api")
           ]
         end
 

spec/lib/trmnl/api/configuration/loader_spec.rb

@@ -10,7 +10,7 @@ RSpec.describe TRMNL::API::Configuration::Loader do
       expect(loader.call).to eq(
         TRMNL::API::Configuration::Content[
           content_type: "application/json",
-          uri: "https://trmnl.app/api"
+          uri: "https://usetrmnl.com/api"
         ]
       )
     end
@@ -18,13 +18,13 @@ RSpec.describe TRMNL::API::Configuration::Loader do
     it "answers custom configuration when environment is set" do
       loader = described_class.new environment: {
         "TRMNL_API_CONTENT_TYPE" => "application/xml",
-        "TRMNL_API_URI" => "https://api.trmnl.com"
+        "TRMNL_API_URI" => "https://usetrmnl.com"
       }
 
       expect(loader.call).to eq(
         TRMNL::API::Configuration::Content[
           content_type: "application/xml",
-          uri: "https://api.trmnl.com"
+          uri: "https://usetrmnl.com"
         ]
       )
     end