Updated Github Workflows to trigger upon PR

- Added the 'pull_request' element to the yml so that now all workflows should be triggered on any event for any pull request in any branch

Author: ashercuedo

.github/workflows/scan-code.yml

@@ -1,6 +1,7 @@
 on:
   push:
   workflow_dispatch:
+  pull_request:
   schedule:
     - cron: "0 ? * * 1"
 

.github/workflows/test-macos-latest.yml

@@ -1,6 +1,7 @@
 on:
   push:
   workflow_dispatch:
+  pull_request:
   schedule:
     - cron: "0 ? * * 1"
 

.github/workflows/test-ubuntu-latest.yml

@@ -1,6 +1,7 @@
 on:
   push:
   workflow_dispatch:
+  pull_request:
   schedule:
     - cron: "0 ? * * 1"
 

.github/workflows/test-windows-latest.yml

@@ -1,6 +1,7 @@
 on:
   push:
   workflow_dispatch:
+  pull_request:
   schedule:
     - cron: "0 ? * * 1"