add --working-dir=. to pre-finalize for c#

Author: erik-krogh

csharp/tools/pre-finalize.cmd

@@ -7,6 +7,7 @@ type NUL && "%CODEQL_DIST%\codeql" database index-files ^
     --include-extension=.xml ^
     --size-limit 10m ^
     --language xml ^
+    --working-dir=. ^
     -- ^
     "%CODEQL_EXTRACTOR_CSHARP_WIP_DATABASE%" ^
     >nul 2>&1

csharp/tools/pre-finalize.sh

@@ -9,6 +9,7 @@ set -eu
     --include-extension=.xml \
     --size-limit 10m \
     --language xml \
+    --working-dir=. \
     -- \
     "$CODEQL_EXTRACTOR_CSHARP_WIP_DATABASE" \
     > /dev/null 2>&1