docs(readme): update requirements to mention M1-based macs

.github/workflows/build.yml

@@ -40,7 +40,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.8"
+          ref: "v0.6.9"
           path: builder
       - uses: actions/setup-go@v2
         with:
@@ -96,7 +96,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.8"
+          ref: "v0.6.9"
           path: builder
       - uses: ruby/setup-ruby@v1
         with:

README.md

@@ -8,11 +8,15 @@
 
 <p align="center">
   <a href="https://github.com/jimeh/emacs-builds/releases/latest">
-    <img alt="GitHub release (stable)" src="https://img.shields.io/github/v/release/jimeh/emacs-builds?style=flat&label=stable&color=%237F5AB6&logo=GNU%20Emacs&logoColor=white">
+    <img alt="GitHub release (stable)" src="https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjimeh%2Fhomebrew-emacs-builds%2Fmeta%2FCasks%2Femacs-app%2Fshield.json">
   </a>
   <a href="https://github.com/jimeh/emacs-builds/releases">
-    <img alt="GitHub release (nightly)" src="https://img.shields.io/github/v/release/jimeh/emacs-builds?include_prereleases&style=flat&label=nightly&color=%237F5AB6&logo=GNU%20Emacs&logoColor=white">
+    <img alt="GitHub release (nightly)" src="https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjimeh%2Fhomebrew-emacs-builds%2Fmeta%2FCasks%2Femacs-app-nightly%2Fshield.json">
   </a>
+  <a href="https://github.com/jimeh/emacs-builds/issues/7">
+    <img alt="GitHub release (known good nightly)" src="https://img.shields.io/endpoint?url=https%3A%2F%2Fraw.githubusercontent.com%2Fjimeh%2Fhomebrew-emacs-builds%2Fmeta%2FCasks%2Femacs-app-good%2Fshield.json">
+  </a>
+  <br />
   <a href="https://github.com/jimeh/emacs-builds/issues">
     <img alt="GitHub issues" src="https://img.shields.io/github/issues-raw/jimeh/emacs-builds?style=flat&logo=github&logoColor=white">
   </a>
@@ -62,7 +66,7 @@
 
 ## System Requirements
 
-- Intel-based Mac running macOS 10.15.x or later.
+- macOS 10.15.x or later (uses Rosetta2 on M1-based macs).
 - Homebrew `gcc` formula (nightly builds only).
 - Xcode Command Line Tools (nightly builds only).
 
@@ -84,7 +88,9 @@ any issues.
 
 ### Homebrew Cask
 
-1. Install the `jimeh/emacs-builds` Homebrew tap:
+1. Install the
+   [`jimeh/emacs-builds`](https://github.com/jimeh/homebrew-emacs-builds)
+   Homebrew tap:
    ```
    brew tap jimeh/emacs-builds
    ```