Update variables.yml

Author: SimaTian

eng/pipelines/common/variables.yml

@@ -44,7 +44,7 @@ variables:
   value: ${{ notin(variables['Build.DefinitionName'], 'runtime-extra-platforms', 'runtime-wasm', 'runtime-wasm-libtests', 'runtime-wasm-non-libtests', 'runtime-ioslike', 'runtime-ioslikesimulator', 'runtime-android', 'runtime-androidemulator', 'runtime-maccatalyst', 'runtime-linuxbionic') }}
 - name: isNotSpecificPlatformOnlyBuild
   value: ${{ notin(variables['Build.DefinitionName'], 'runtime-wasm', 'runtime-wasm-libtests', 'runtime-wasm-non-libtests', 'runtime-ioslike', 'runtime-ioslikesimulator', 'runtime-android', 'runtime-androidemulator', 'runtime-maccatalyst', 'runtime-linuxbionic') }}
-- name: MSBUILDUSESERVER
+- name: env:MSBUILDUSESERVER
   value: 1
 
 - name: debugOnPrReleaseOnRolling