Update hotfixes readme to use branch in go mod replace (hypertrace#28)

Signed-off-by: Pavol Loffay <[email protected]>

Author: pavolloffay

OPENTELEMETRY_COLLECTOR_HOTFIXES.md

@@ -4,8 +4,8 @@ All fixes and features for the upstream [open-telemetry/opentelemetry-collector]
 should be submitted to the upstream project. However, merge and release into the upstream might take some time
 therefore urgent patches can be applied to the fork [hypertrace/opentelemetry-collector](https://github.com/hypertrace/opentelemetry-collector).
 
-Edit `go.mod` to use forked collector:
+Edit `go.mod` to use forked collector with branch `main+patches`:
 
 ```bash
-go mod edit -replace  go.opentelemetry.io/collector=github.com/hypertrace/opentelemetry-collector@d61af22c3882c312004871795f4288c09f98e372
+go mod edit -replace  go.opentelemetry.io/collector=github.com/hypertrace/opentelemetry-collector@main+patches
 ```