Beatify "main" warning about breaking changes (#144)

* add warning

* Update src/setup-java.ts

Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

* Update index.js

Co-authored-by: Konrad Pabjan <konradpabjan@github.com>

dist/setup/index.js

@@ -28814,7 +28814,7 @@ function run() {
                 const keyFingerprint = (yield gpg.importKey(gpgPrivateKey)) || '';
                 core.saveState(constants.STATE_GPG_PRIVATE_KEY_FINGERPRINT, keyFingerprint);
             }
-            core.warning(`All setup-java actions pinned to 'main' branch will fail on 5th April 2021. Please explicitly reference your action to the 'v1' tag ('actions/setup-java@v1') to avoid build failures. Find more details in https://github.com/actions/setup-java/issues/137`);
+            core.warning(`All setup-java actions pinned to the 'main' branch will fail on April 5th 2021. Please explicitly reference your action with the 'v1' tag ('actions/setup-java@v1') to avoid build failures. Find more details at https://github.com/actions/setup-java/issues/137`);
         }
         catch (error) {
             core.setFailed(error.message);