Fix toolchain resolution flag for bazel 6

PiperOrigin-RevId: 676101880

.github/workflows/test_bazel.yml

@@ -28,20 +28,19 @@ jobs:
       matrix:
         runner: [ ubuntu, windows, macos ]
         bazelversion: [ '7.1.2' ]
-        bzlmod: [true, false ]
-        toolchain_resolution: [false ]
+        bzlmod: [ true, false ]
+        toolchain_resolution: [ "" ]
         include:
           - runner: ubuntu
             bazelversion: '6.4.0'
             # Not running Bazel 6 with bzlmod, because it doesn't support use_repo_rule in rules_jvm_external
             bzlmod: false
-            continuous-only: true
           - runner: ubuntu
             bzlmod: false
-            toolchain_resolution: true
+            toolchain_resolution: --incompatible_enable_proto_toolchain_resolution=true
           - runner: ubuntu
             bzlmod: true
-            toolchain_resolution: true
+            toolchain_resolution: --incompatible_enable_proto_toolchain_resolution=true
     runs-on: ${{ matrix.runner }}-latest
     name: ${{ matrix.continuous-only && inputs.continuous-prefix || '' }} Examples ${{ matrix.runner }} ${{ matrix.bazelversion }}${{ matrix.bzlmod && ' (bzlmod)' || '' }} ${{ matrix.toolchain_resolution && ' (toolchain resolution)' || '' }}
     steps:
@@ -70,4 +69,4 @@ jobs:
           credentials: ${{ secrets.GAR_SERVICE_ACCOUNT }}
           bazel-cache: examples
           version: ${{ matrix.bazelversion }}
-          bash: cd examples && bazel build //... $BAZEL_FLAGS --enable_bzlmod=${{ matrix.bzlmod }} --incompatible_enable_proto_toolchain_resolution=${{ matrix.toolchain_resolution }}
+          bash: cd examples && bazel build //... $BAZEL_FLAGS --enable_bzlmod=${{ matrix.bzlmod }} ${{ matrix.toolchain_resolution }}