Another try at fixing YAML syntax.

.github/workflows/bazel_tests.yml

diff --git a/.github/workflows/bazel_tests.yml b/.github/workflows/bazel_tests.yml
index 89da77a..56c9e5a 100644
--- a/.github/workflows/bazel_tests.yml
+++ b/.github/workflows/bazel_tests.yml
@@ -17,12 +17,12 @@
     strategy:
       matrix:
         include:
-          - { CC: clang os: ubuntu-20.04 flags: "" }
-          - { CC: clang os: ubuntu-20.04 flags: "-c opt" }  # Some warnings only fire with -c opt
-          - { CC: gcc os: ubuntu-20.04 flags: "-c opt" }
-          - { CC: clang os: ubuntu-20.04 flags: "--//:fasttable_enabled=true -- -cmake:test_generated_files" }
-          - { CC: clang os: ubuntu-20.04 flags: "--config=asan -- -benchmarks:benchmark" }
-          - { CC: clang os: macos-11 flags: "" }
+          - { CC: clang, os: ubuntu-20.04, flags: "" }
+          - { CC: clang, os: ubuntu-20.04, flags: "-c opt" }  # Some warnings only fire with -c opt
+          - { CC: gcc, os: ubuntu-20.04, flags: "-c opt" }
+          - { CC: clang, os: ubuntu-20.04, flags: "--//:fasttable_enabled=true -- -cmake:test_generated_files" }
+          - { CC: clang, os: ubuntu-20.04, flags: "--config=asan -- -benchmarks:benchmark" }
+          - { CC: clang, os: macos-11, flags: "" }
 
     steps:
       - uses: actions/checkout@v2