Add brew to path on linux (#64)

Fixes build breakage caused by actions/runner-images#6283

Co-authored-by: Cian Johnston <public@cianjohnston.ie>

Author: dwahler

.github/workflows/test.yaml

@@ -9,6 +9,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v1
+      - run: |
+          if [[ "$(uname -s)" == "Linux" ]]
+          then
+            echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
+          fi
       - run: brew install --build-from-source ./coder-cli.rb 
       - run: coder --version
   coder_cli_nightly:
@@ -18,5 +23,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v1
+      - run: |
+          if [[ "$(uname -s)" == "Linux" ]]
+          then
+            echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
+          fi
       - run: brew install --build-from-source ./coder-cli-nightly.rb
       - run: coder --version