Update docs/product/tracing/index.mdx

Author: lizokm

docs/product/tracing/index.mdx

@@ -23,7 +23,7 @@ While Sentry tracing can be useful if instrumented in just the frontend or the b
 
 ### Traces
 
-A trace is a unique identifier that tracks a complete operation across multiple services. Every event sent to Sentry (Errors, Spans, Replays, Profiles, and so on)will have a trace id linking frontend and backend events together.
+A trace is a unique identifier that tracks a complete operation across multiple services. Every event sent to Sentry (Errors, Spans, Replays, Profiles, and so on) will have a trace id linking frontend and backend events together.
 
 ### Spans