Fix odo commands and a heading bug.

cli_reference/developer_cli_odo/understanding-odo.adoc

@@ -1,5 +1,5 @@
 [id="understanding-odo"]
-= Understanding `{odo-title}`
+= Understanding `odo`
 include::modules/developer-cli-odo-attributes.adoc[]
 include::modules/common-attributes.adoc[]
 :context: understanding-odo

modules/developer-cli-odo-deploying-the-back-end-component.adoc

@@ -116,7 +116,7 @@ $ mvn package
 +
 [source,terminal]
 ----
-$ odo create openjdk18 backend --binary target/wildwest-1.0.jar
+$ odo create --s2i openjdk18 backend --binary target/wildwest-1.0.jar
 ----
 +
 .Example output

modules/developer-cli-odo-deploying-the-front-end-component.adoc

@@ -55,7 +55,7 @@ The front-end component is written in an interpreted language (Node.js); it does
 +
 [source,terminal]
 ----
-$ odo create nodejs frontend
+$ odo create --s2i nodejs frontend
 ----
 +
 .Example output