CI: Update homebrew Redis version. (#1191)

Fixes cross-compilation QEMU CI tests

* CI: Update homebrew Redis version.
* CI: Try apt-get update as a workaround.

.github/workflows/build.yml

@@ -133,8 +133,8 @@ jobs:
 
       - name: Install dependencies
         run: |
-          brew install openssl redis@6.2
-          brew link redis@6.2 --force
+          brew install openssl redis@7.0
+          brew link redis@7.0 --force
 
       - name: Build hiredis
         run: USE_SSL=1 make

.github/workflows/test.yml

@@ -60,7 +60,7 @@ jobs:
     steps:
     - name: Install qemu
       if: matrix.emulator
-      run: sudo apt-get install -y qemu-user
+      run: sudo apt-get update && sudo apt-get install -y qemu-user
     - name: Install platform toolset
       if: matrix.toolset
       run: sudo apt-get install -y gcc-${{matrix.toolset}}