Add names to variables in Worker interface

This is another small one: add names to variables in functions that are
in the `Worker` interface. These aren't strictly needed and may be
omitted, but are helpful in the case of IDEs like VScode so that when
users tell their IDE to implement an interface, the IDE generates
functions with nice variable names instead of stand-in boilerplate.

worker.go

@@ -41,13 +41,13 @@ type Worker[T JobArgs] interface {
 	// Note that this method on a worker overrides any client-level retry policy.
 	// To use the client-level retry policy, return an empty `time.Time{}` or
 	// include WorkerDefaults to do this for you.
-	NextRetry(j *Job[T]) time.Time
+	NextRetry(job *Job[T]) time.Time
 
 	// Timeout is the maximum amount of time the job is allowed to run before
 	// its context is cancelled. A timeout of zero (the default) means the job
 	// will inherit the Client-level timeout. A timeout of -1 means the job's
 	// context will never time out.
-	Timeout(*Job[T]) time.Duration
+	Timeout(job *Job[T]) time.Duration
 
 	// Work performs the job and returns an error if the job failed. The context
 	// will be configured with a timeout according to the worker settings and may
@@ -60,7 +60,7 @@ type Worker[T JobArgs] interface {
 	// the client to respond to shutdown requests; there is no way to cancel a
 	// running job that does not respect context cancellation, other than
 	// terminating the process.
-	Work(context.Context, *Job[T]) error
+	Work(ctx context.Context, job *Job[T]) error
 }
 
 // WorkerDefaults is an empty struct that can be embedded in your worker