fix: fix on-push-to-main issue (#5717)

Fixes a small issue with bash variable interpolation, `$provider_` gets
interpreted as `${provider_}` instead of `${provider}_` and we want the
latter.

/test-all

Author: jacek-prisma

.github/workflows/on-push-to-main.yml

@@ -34,7 +34,7 @@ jobs:
           for provider in "postgresql" "mysql" "sqlite" "sqlserver" "cockroachdb"; do
             for build in "fast" "small"; do
               cp $PKG_DIR/$provider/query_compiler_${build}_bg.wasm $TARGET_DIR/query-compiler-$build-$provider.wasm
-              cp $PKG_DIR/$provider_${build}.gz $TARGET_DIR/query-compiler-$build-$provider.wasm.gz
+              cp $PKG_DIR/${provider}_${build}.gz $TARGET_DIR/query-compiler-$build-$provider.wasm.gz
             done
           done