Update language autodetect Swift check

Author: henrymercer

.github/workflows/__multi-language-autodetect.yml

@@ -61,9 +61,7 @@ steps:
       fi
 
   - name: Check language autodetect for Swift
-    if: >-
-      env.CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT == 'true' ||
-          (runner.os != 'Windows' && matrix.version == 'nightly-latest')
+    if: runner.os != 'Windows' && matrix.version != 'stable-20230403'
     shell: bash
     run: |
       SWIFT_DB=${{ fromJson(steps.analysis.outputs.db-locations).swift }}