(DOCSP-47155) Updates button name. (#740)

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- [DOCSP-47155](https://jira.mongodb.org/browse/DOCSP-47155)
-
[STAGING](https://deploy-preview-740--docs-ops-manager.netlify.app/tutorial/upgrade-ops-manager/#update-all-agents)

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taxonomy
[values](https://wiki.corp.mongodb.com/display/DE/Docs+Taxonomy) at top
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Author: erabil-mdb

source/includes/steps-source-upgrade-onprem.yaml

@@ -38,7 +38,7 @@ content: |
   |onprem| displays a banner that says :guilabel:`One or more agents
   are out of date`.
 
-  Click :guilabel:`Update All Agents`, then confirm the changes.
+  Click :guilabel:`Update Software Components`, then confirm the changes.
 
   .. important::