Clean up Github workflows' name

.github/workflows/ci.yaml

@@ -1,4 +1,4 @@
-name: GitHub Actions CI
+name: CI - Main
 
 # Cache is used for all Windows and macOS dependencies (size approx. 1230 * 2 + 1850 = 4310 MiB)
 # Cache is not used for Ubuntu builds, because it already has all dependencies except

.github/workflows/file_health.yaml

@@ -1,4 +1,4 @@
-name: GitHub Actions file health check
+name: CI - File health
 
 on: [pull_request, push]
 

.github/workflows/webui_ci.yaml

@@ -1,4 +1,4 @@
-name: WebUI CI
+name: CI - WebUI
 
 on: [pull_request, push]