Replace `PromQL` -> `LogQL` wordings in Querier (#5602)

pkg/querier/worker/worker.go

@@ -28,7 +28,7 @@ type Config struct {
 
 	Parallelism           int  `yaml:"parallelism"`
 	MatchMaxConcurrency   bool `yaml:"match_max_concurrent"`
-	MaxConcurrentRequests int  `yaml:"-"` // Must be same as passed to PromQL Engine.
+	MaxConcurrentRequests int  `yaml:"-"` // Must be same as passed to LogQL Engine.
 
 	QuerierID string `yaml:"id"`
 
@@ -260,7 +260,7 @@ func (w *querierWorker) resetConcurrency() {
 
 		// If concurrency is 0 then MaxConcurrentRequests is less than the total number of
 		// frontends/schedulers. In order to prevent accidentally starving a frontend or scheduler we are just going to
-		// always connect once to every target.  This is dangerous b/c we may start exceeding PromQL
+		// always connect once to every target.  This is dangerous b/c we may start exceeding LogQL
 		// max concurrency.
 		if concurrency == 0 {
 			concurrency = 1
@@ -272,7 +272,7 @@ func (w *querierWorker) resetConcurrency() {
 	}
 
 	if totalConcurrency > w.cfg.MaxConcurrentRequests {
-		level.Warn(w.logger).Log("msg", "total worker concurrency is greater than promql max concurrency. Queries may be queued in the querier which reduces QOS")
+		level.Warn(w.logger).Log("msg", "total worker concurrency is greater than logql max concurrency. Queries may be queued in the querier which reduces QOS")
 	}
 }