Update GitHub Actions workflows

- Pin to full -length commit hash
- Add master alongside main

.github/workflows/build.yml

@@ -2,11 +2,11 @@ name: Go Build Multi-Platform
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "main", "master" ]
     tags:
       - 'v*'
   pull_request:
-    branches: [ "main" ]
+    branches: [ "main", "master" ]
 
 jobs:
   build:
@@ -27,10 +27,10 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955
+      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
     - name: Set up Go
-      uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5
+      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
       with:
         go-version: '1.25'
 
@@ -58,7 +58,7 @@ jobs:
         echo "Calculated SHA256 for ${output_name}"
 
     - name: Upload Artifact
-      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
+      uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
       with:
         name: reticulum-go-${{ matrix.goos }}-${{ matrix.goarch }}
         path: reticulum-go-${{ matrix.goos }}-${{ matrix.goarch }}*
@@ -74,7 +74,7 @@ jobs:
 
     steps:
       - name: Download All Build Artifacts
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
         with:
           path: ./release-assets
 
@@ -82,6 +82,6 @@ jobs:
         run: ls -R ./release-assets
 
       - name: Create GitHub Release
-        uses: softprops/action-gh-release@6cbd405e2c4e67a21c47fa9e383d020e4e28b836
+        uses: softprops/action-gh-release@6da8fa9354ddfdc4aeace5fc48d7f679b5214090 # v2.4.1
         with:
           files: ./release-assets/*/*