README.md: Update link to code-signing doc

Author: G-Ray

README.md

@@ -8,8 +8,8 @@ If you can't use GitHub, you can use other providers:
 **NOTE:** If you want to run through this whole process, you will need to fork this repo on GitHub and replace all instances of `iffy` with your GitHub username before doing the following steps.
 
 1. For macOS, you will need a code-signing certificate.
-    
-    Install Xcode (from the App Store), then follow [these instructions](https://developer.apple.com/library/content/documentation/IDEs/Conceptual/AppDistributionGuide/MaintainingCertificates/MaintainingCertificates.html#//apple_ref/doc/uid/TP40012582-CH31-SW6) to make sure you have a "Mac Developer" certificate.  If you'd like to export the certificate (for automated building, for instance) [you can](https://developer.apple.com/library/content/documentation/IDEs/Conceptual/AppDistributionGuide/MaintainingCertificates/MaintainingCertificates.html#//apple_ref/doc/uid/TP40012582-CH31-SW7).  You would then follow [these instructions](https://github.com/electron-userland/electron-builder/wiki/Code-Signing).
+
+    Install Xcode (from the App Store), then follow [these instructions](https://developer.apple.com/library/content/documentation/IDEs/Conceptual/AppDistributionGuide/MaintainingCertificates/MaintainingCertificates.html#//apple_ref/doc/uid/TP40012582-CH31-SW6) to make sure you have a "Mac Developer" certificate.  If you'd like to export the certificate (for automated building, for instance) [you can](https://developer.apple.com/library/content/documentation/IDEs/Conceptual/AppDistributionGuide/MaintainingCertificates/MaintainingCertificates.html#//apple_ref/doc/uid/TP40012582-CH31-SW7).  You would then follow [these instructions](https://www.electron.build/code-signing).
 
 2. Adjust `package.json` if needed.
 
@@ -30,12 +30,12 @@ If you can't use GitHub, you can use other providers:
 3. Install necessary dependencies with:
 
         yarn
-   
+
    or
-   
+
         npm install
 
-4. Generate a GitHub access token by going to <https://github.com/settings/tokens/new>.  The access token should have the `repo` scope/permission.  Once you have the token, assign it to an environment variable 
+4. Generate a GitHub access token by going to <https://github.com/settings/tokens/new>.  The access token should have the `repo` scope/permission.  Once you have the token, assign it to an environment variable
 
     On macOS/linux:
 
@@ -62,7 +62,7 @@ If you can't use GitHub, you can use other providers:
             "publish": "build --mac --win -p always"
         },
         ...
-    
+
 6. Release the release on GitHub by going to <https://github.com/iffy/electron-updater-example/releases>, editing the release and clicking "Publish release."
 
 7. Download and install the app from <https://github.com/iffy/electron-updater-example/releases>.
@@ -72,4 +72,3 @@ If you can't use GitHub, you can use other providers:
 9. Do steps 5 and 6 again.
 
 10. Open the installed version of the app and see that it updates itself.
-