Use more meaningful variable names in release workflows

GitHub Actions workflows are used to automatically generate beta tester and production builds of the project.

A separate build is generated for each of the target host types. This is done using a job matrix, which creates a
parallel run of the workflow job for each target. The matrix defines variables that provide the data that is specific to
each job.

The variable names used previously did not clearly communicate their nature:

- The variable for the task name was named "os"
- The variables for the build filename components used the term "artifact", which is ambiguous in this context where the
  term is otherwise used to refer to the completely unrelated workflow artifacts

These variable names made it very difficult for anyone not intimately familiar with the workings of the workflow to
understand its code.

Author: per1234

.github/workflows/release-go-crosscompile-task.yml

@@ -23,7 +23,7 @@ jobs:
 
     strategy:
       matrix:
-        os:
+        task:
           - Windows_32bit
           - Windows_64bit
           - Linux_32bit
@@ -42,7 +42,7 @@ jobs:
 
       - name: Create changelog
         # Avoid creating the same changelog for each os
-        if: matrix.os == 'Windows_32bit'
+        if: matrix.task == 'Windows_32bit'
         uses: arduino/create-changelog@v1
         with:
           tag-regex: '^[0-9]+\.[0-9]+\.[0-9]+.*$'
@@ -62,7 +62,7 @@ jobs:
           version: 3.x
 
       - name: Build
-        run: task dist:${{ matrix.os }}
+        run: task dist:${{ matrix.task }}
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v3
@@ -72,7 +72,7 @@ jobs:
           path: ${{ env.DIST_DIR }}
 
   notarize-macos:
-    name: Notarize ${{ matrix.artifact.name }}
+    name: Notarize ${{ matrix.build.folder-suffix }}
     runs-on: macos-latest
     needs: create-release-artifacts
     outputs:
@@ -84,11 +84,11 @@ jobs:
 
     strategy:
       matrix:
-        artifact:
-          - name: darwin_amd64
-            path: "macOS_64bit.tar.gz"
-          - name: darwin_arm64
-            path: "macOS_ARM64.tar.gz"
+        build:
+          - folder-suffix: darwin_amd64
+            package-suffix: "macOS_64bit.tar.gz"
+          - folder-suffix: darwin_arm64
+            package-suffix: "macOS_ARM64.tar.gz"
 
     steps:
       - name: Checkout repository
@@ -133,7 +133,7 @@ jobs:
         run: |
           cat > "${{ env.GON_CONFIG_PATH }}" <<EOF
           # See: https://github.com/Bearer/gon#configuration-file
-          source = ["${{ env.DIST_DIR }}/${{ env.PROJECT_NAME }}_osx_${{ matrix.artifact.name }}/${{ env.PROJECT_NAME }}"]
+          source = ["${{ env.DIST_DIR }}/${{ env.PROJECT_NAME }}_osx_${{ matrix.build.folder-suffix }}/${{ env.PROJECT_NAME }}"]
           bundle_id = "cc.arduino.${{ env.PROJECT_NAME }}"
 
           sign {
@@ -162,10 +162,10 @@ jobs:
         run: |
           # GitHub's upload/download-artifact actions don't preserve file permissions,
           # so we need to add execution permission back until the action is made to do this.
-          chmod +x "${{ env.PROJECT_NAME }}_osx_${{ matrix.artifact.name }}/${{ env.PROJECT_NAME }}"
+          chmod +x "${{ env.PROJECT_NAME }}_osx_${{ matrix.build.folder-suffix }}/${{ env.PROJECT_NAME }}"
           TAG="${GITHUB_REF/refs\/tags\//}"
-          PACKAGE_FILENAME="${{ env.PROJECT_NAME }}_${TAG}_${{ matrix.artifact.path }}"
-          tar -czvf "$PACKAGE_FILENAME" "${{ env.PROJECT_NAME }}_osx_${{ matrix.artifact.name }}"
+          PACKAGE_FILENAME="${{ env.PROJECT_NAME }}_${TAG}_${{ matrix.build.package-suffix }}"
+          tar -czvf "$PACKAGE_FILENAME" "${{ env.PROJECT_NAME }}_osx_${{ matrix.build.folder-suffix }}/"
           echo "PACKAGE_FILENAME=$PACKAGE_FILENAME" >> $GITHUB_ENV
 
       - name: Upload artifact