github/workflows/tests: add more needs: syntax

Make more of the longer (i.e. >5m) jobs require the `syntax` job to have
completed. These jobs are so much quicker than the macOS job so that
this will not slow down the overall CI run while avoiding the run of
some jobs if `syntax` fails.

.github/workflows/tests.yml

@@ -40,6 +40,7 @@ jobs:
 
   tap-syntax:
     name: tap syntax (Linux)
+    needs: syntax
     if: startsWith(github.repository, 'Homebrew/')
     runs-on: ubuntu-latest
     steps:
@@ -157,6 +158,7 @@ jobs:
         run: git diff --stat --exit-code Library/Homebrew/vendor/bundle/ruby
 
   docker:
+    needs: syntax
     runs-on: ubuntu-latest
     steps:
       - name: Set up Homebrew
@@ -180,6 +182,7 @@ jobs:
 
   tests:
     name: ${{ matrix.name }}
+    needs: syntax
     runs-on: ubuntu-latest
     strategy:
       matrix: