make sub workflows more visible (#421)

Co-authored-by: Cynthia Jiang <cynthiajiang@google.com>

Author: cynthiajoan

.github/workflows/build_android.yml

@@ -1,5 +1,5 @@
 # Workflow to handle building the Unity SDK on android
-name: Build Android Reuse
+name: Build Android (SubWorkflow)
 
 on:
   workflow_call:

.github/workflows/build_ios.yml

@@ -1,5 +1,5 @@
 # Workflow to handle building the Unity SDK on iOS
-name: Build iOS Reuse
+name: Build iOS (SubWorkflow)
 
 on:
   workflow_call:

.github/workflows/build_linux.yml

@@ -1,5 +1,5 @@
 # Workflow to handle building the Unity SDK on linux
-name: Build linux Reuse
+name: Build linux (SubWorkflow)
 
 on:
   workflow_call:

.github/workflows/build_macos.yml

@@ -1,5 +1,5 @@
 # Workflow to handle building the Unity SDK on macOS
-name: Build macOS Reuse
+name: Build macOS (SubWorkflow)
 
 on:
   workflow_call:

.github/workflows/build_windows.yml

@@ -1,5 +1,5 @@
 # Workflow to handle building the Unity SDK on windows
-name: Build windows Reuse
+name: Build windows (SubWorkflow)
 
 on:
   workflow_call:

.github/workflows/package.yml

@@ -1,5 +1,5 @@
 # Workflow to handle packaging the Unity SDK
-name: Package SDKs
+name: Package SDKs (SubWorkflow)
 
 on:
   workflow_call: