docs: update run-tests note format

Fixes note added in GoogleCloudPlatform#11475 to work within Hugo and match other notes

docs/content/develop/test/run-tests.md

@@ -62,8 +62,7 @@ aliases:
     make testacc TEST=./google/services/container TESTARGS='-run=TestAccContainerNodePool'
     ```
 
-> [!NOTE]
-> Acceptance tests create actual infrastructure which can incur costs. Acceptance tests may not clean up after themselves if interrupted, so you may want to check for stray resources and / or billing charges.
+> **Note:** Acceptance tests create actual infrastructure which can incur costs. Acceptance tests may not clean up after themselves if interrupted, so you may want to check for stray resources and / or billing charges.
 
 1. Optional: Save verbose test output (including API requests and responses) to a file for analysis.
 
@@ -95,8 +94,7 @@ aliases:
     ```bash
     make testacc TEST=./google-beta/services/container TESTARGS='-run=TestAccContainerNodePool'
     ```
-> [!NOTE]
-> Acceptance tests create actual infrastructure which can incur costs. Acceptance tests may not clean up after themselves if interrupted, so you may want to check for stray resources and / or billing charges.
+> **Note:** Acceptance tests create actual infrastructure which can incur costs. Acceptance tests may not clean up after themselves if interrupted, so you may want to check for stray resources and / or billing charges.
 
 1. Optional: Save verbose test output to a file for analysis.