Run cmake and example-plugins CI steps on pull requests too

Signed-off-by: falkTX <falktx@falktx.com>

.github/workflows/cmake.yml

@@ -2,6 +2,11 @@ name: cmake
 
 on:
   push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
 
 env:
   BUILD_TYPE: Release

.github/workflows/example-plugins.yml

@@ -2,6 +2,11 @@ name: example-plugins
 
 on:
   push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
 
 jobs:
   ubuntu-20-04: