chore(cask): fix cask vs formula terminology

Homebrew casks are their own thing, separate from formulas. Hence remove
all mentions to "formula" to avoid confusion.

.github/workflows/update-casks.yml

@@ -1,5 +1,5 @@
 ---
-name: Update Formulas
+name: Update Casks
 on:
   schedule:
     - cron: "0 3 * * *"
@@ -11,7 +11,7 @@ on:
         default: ""
 
 jobs:
-  update:
+  update-casks:
     runs-on: macos-10.15
     steps:
       - name: Checkout tap repository
@@ -26,7 +26,7 @@ jobs:
       - name: brew livecheck
         run: >-
           brew livecheck --json --quiet --tap jimeh/emacs-builds
-          > livecheck-results.json
+          | tee livecheck-results.json
       - name: Upload livecheck-results.json artifact
         uses: actions/upload-artifact@v2
         with:
@@ -37,22 +37,20 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.2"
+          ref: "v0.6.6"
           path: builder
       - uses: actions/setup-go@v2
         with:
           go-version: 1.16
       - uses: actions/cache@v2
-        id: builder-cache
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('builder/**/go.sum') }}
           restore-keys: ${{ runner.os }}-go-
       - name: Build emacs-builder tool
-        if: steps.cache.outputs.cache-hit != 'true'
         run: make build
         working-directory: builder
-      - name: Update Cask formulas
+      - name: Update casks
         run: >-
           builder/bin/emacs-builder
           cask --builds-repository jimeh/emacs-builds

README.md

@@ -4,7 +4,7 @@
 
 <p align="center">
   <a href="https://github.com/jimeh/homebrew-emacs-builds/actions">
-    <img alt="Build status" src="https://img.shields.io/github/workflow/status/jimeh/homebrew-emacs-builds/Update%20Formulas.svg?style=flat&label=build&logo=github&logoColor=white">
+    <img alt="Build status" src="https://img.shields.io/github/workflow/status/jimeh/homebrew-emacs-builds/Update%20Casks.svg?style=flat&label=build&logo=github&logoColor=white">
   </a>
   <a href="https://github.com/jimeh/homebrew-emacs-builds/issues">
     <img alt="GitHub issues" src="https://img.shields.io/github/issues-raw/jimeh/homebrew-emacs-builds?style=flat&logo=github">