Reference dagster/max_runtime tag in docs instead of the python const…

…ant (#20243)

Summary:
Since you might apply this tag in places other than python, the Python
constant indirection here is causing more confusion than doing good.

Test Plan: Inspect docs page

## Summary & Motivation

## How I Tested These Changes

docs/content/deployment/run-monitoring.mdx

@@ -31,21 +31,21 @@ When Dagster terminates a run, the run moves into CANCELING status and sends a t
 
 ## General run timeouts
 
-After a run is marked as STARTED, it may hang indefinitely for various reasons (user API errors, network issues, etc.). `MAX_RUNTIME_SECONDS_TAG` can be used to set a timeout on a per-run basis. If the run exceeds this timeout, and run monitoring is enabled, it will be marked as failed.
+After a run is marked as STARTED, it may hang indefinitely for various reasons (user API errors, network issues, etc.). The `dagster/max_runtime` tag can be used to set a timeout in seconds on a per-run basis. If the run exceeds this timeout, and run monitoring is enabled, it will be marked as failed.
 
 The below code example shows how to set a run timeout of 10 seconds on a per-job basis:
 
 ```python file=/deploying/monitoring_daemon/run_timeouts.py startafter=start_timeout
-from dagster import MAX_RUNTIME_SECONDS_TAG, define_asset_job, job
+from dagster import define_asset_job, job
 
 
-@job(tags={MAX_RUNTIME_SECONDS_TAG: 10})
+@job(tags={"dagster/max_runtime": 10})
 def my_job():
     ...
 
 
 asset_job = define_asset_job(
-    name="some_job", selection="*", tags={MAX_RUNTIME_SECONDS_TAG: 10}
+    name="some_job", selection="*", tags={"dagster/max_runtime": 10}
 )
 # end_timeout
 ```

examples/docs_snippets/docs_snippets/deploying/monitoring_daemon/run_timeouts.py

@@ -1,13 +1,13 @@
 # start_timeout
-from dagster import MAX_RUNTIME_SECONDS_TAG, define_asset_job, job
+from dagster import define_asset_job, job
 
 
-@job(tags={MAX_RUNTIME_SECONDS_TAG: 10})
+@job(tags={"dagster/max_runtime": 10})
 def my_job():
     ...
 
 
 asset_job = define_asset_job(
-    name="some_job", selection="*", tags={MAX_RUNTIME_SECONDS_TAG: 10}
+    name="some_job", selection="*", tags={"dagster/max_runtime": 10}
 )
 # end_timeout

examples/docs_snippets/docs_snippets_tests/deploying_tests/test_monitoring_daemon_examples.py

@@ -1,5 +1,5 @@
+from dagster import MAX_RUNTIME_SECONDS_TAG
 from docs_snippets.deploying.monitoring_daemon.run_timeouts import (
-    MAX_RUNTIME_SECONDS_TAG,
     asset_job,
     my_job,
 )