Allow dependency asset builds from tags

Author: chammoru

.github/workflows/heif-dependency.yml

@@ -1,6 +1,9 @@
 name: Build HEIF Dependency
 
 on:
+  push:
+    tags:
+      - "deps-libheif-*"
   workflow_dispatch:
     inputs:
       triplet:
@@ -23,8 +26,8 @@ jobs:
     runs-on: windows-2022
 
     env:
-      HEIF_TRIPLET: ${{ inputs.triplet }}
-      VCPKG_REF: ${{ inputs.vcpkg_ref }}
+      HEIF_TRIPLET: ${{ inputs.triplet || 'x64-windows' }}
+      VCPKG_REF: ${{ inputs.vcpkg_ref || 'aa40adda5352e87655b8583cfb2451d5e9e276fd' }}
 
     steps:
       - name: Checkout

.github/workflows/opencv-dependency.yml

@@ -1,6 +1,9 @@
 name: Build OpenCV Dependency
 
 on:
+  push:
+    tags:
+      - "deps-opencv-*"
   workflow_dispatch:
     inputs:
       opencv_version:
@@ -18,7 +21,7 @@ jobs:
     runs-on: windows-2022
 
     env:
-      OPENCV_VERSION: ${{ inputs.opencv_version }}
+      OPENCV_VERSION: ${{ inputs.opencv_version || '4.3.0' }}
 
     steps:
       - name: Checkout