Update description for scaling fields of cloud_run_v2_service (#12619) (#20793)

[upstream:6cde90491b1bc60513f71527fd0446c6c1a77c2e]

Signed-off-by: Modular Magician <magic-modules@google.com>

Author: modular-magician

.changelog/12619.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google/services/cloudrunv2/resource_cloud_run_v2_service.go

@@ -493,14 +493,15 @@ If not specified or 0, defaults to 80 when requested CPU >= 1 and defaults to 1
 							Elem: &schema.Resource{
 								Schema: map[string]*schema.Schema{
 									"max_instance_count": {
-										Type:        schema.TypeInt,
-										Optional:    true,
-										Description: `Maximum number of serving instances that this resource should have.`,
+										Type:     schema.TypeInt,
+										Optional: true,
+										Description: `Maximum number of serving instances that this resource should have. Must not be less than minimum instance count. If absent, Cloud Run will calculate
+a default value based on the project's available container instances quota in the region and specified instance size.`,
 									},
 									"min_instance_count": {
 										Type:        schema.TypeInt,
 										Optional:    true,
-										Description: `Minimum number of serving instances that this resource should have.`,
+										Description: `Minimum number of serving instances that this resource should have. Defaults to 0. Must not be greater than maximum instance count.`,
 									},
 								},
 							},

website/docs/r/cloud_run_v2_service.html.markdown

@@ -692,11 +692,12 @@ The following arguments are supported:
 
 * `min_instance_count` -
   (Optional)
-  Minimum number of serving instances that this resource should have.
+  Minimum number of serving instances that this resource should have. Defaults to 0. Must not be greater than maximum instance count.
 
 * `max_instance_count` -
   (Optional)
-  Maximum number of serving instances that this resource should have.
+  Maximum number of serving instances that this resource should have. Must not be less than minimum instance count. If absent, Cloud Run will calculate
+  a default value based on the project's available container instances quota in the region and specified instance size.
 
 <a name="nested_vpc_access"></a>The `vpc_access` block supports: