Fix typo in sql_exporter generator

Bad copy-paste seemingly. This manifested itself as a failure to start
for the sql_exporter, and was just dying on loop in staging. A future PR
will have E2E testing of sql_exporter.

Signed-off-by: Tristan Partin <tristan@neon.tech>

compute/etc/sql_exporter.jsonnet

@@ -28,7 +28,7 @@ function(collector_file, application_name='sql_exporter') {
     // Collectors (referenced by name) to execute on the target.
     // Glob patterns are supported (see <https://pkg.go.dev/path/filepath#Match> for syntax).
     collectors: [
-      'neon_collector_autoscaling',
+      'neon_collector',
     ],
   },