Lots of minor freshness updates to high-traffic pages

PiperOrigin-RevId: 595171199
Change-Id: I31f9123239082c6bb8ba8ad23159393553b63621
diff --git a/docs/onboarding.md b/docs/onboarding.md
index 46b6e88..f4e5efa 100644
--- a/docs/onboarding.md
+++ b/docs/onboarding.md
@@ -7,10 +7,9 @@
 
 This page does **not** cover best practices for the content of changes. Please
 see [Life of a Jetpack Feature](/docs/loaf.md) for details on
-developing and releasing a library,
+creating and releasing a library or
 [API Guidelines](/docs/api_guidelines/index.md) for best
-practices regarding public APIs and an overview of the constraints placed on
-changes.
+practices regarding library development.
 
 ## Workstation setup {#setup}
 
@@ -475,7 +474,7 @@
 NOTE `./gradlew tasks` always has the canonical task information! When in doubt,
 run `./gradlew tasks`
 
-#### Generate Docs
+#### Generate docs
 
 To build API reference docs for both Java and Kotlin source code using Dackka,
 run the Gradle task:
@@ -1070,6 +1069,6 @@
 
 as well as `androidTestImplementation(libs.multidex)` to the dependenices block.
 
-If you want it enabled for the application and not test apk, add
+If you want it enabled for the application and not test APK, add
 `implementation(libs.multidex)` to the dependencies block instead. Any prior
 failures may not re-occur now that the software is multi-dexed. Rerun the build.