Correct branch name in template source URLs

The template files contain comments documenting their source to facilitate syncs in both directions. The repository these
files were originally planned to be added to used `master` as the default branch name, but this repository uses `main`.
The name change was missed when adding the files to the repository.

Author: per1234

.editorconfig

@@ -1,4 +1,4 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/master/workflow-templates/assets/shared/.editorconfig
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/shared/.editorconfig
 # See: https://editorconfig.org/
 # The formatting style defined in this file is the official standardized style to be used in all Arduino Tooling
 # projects and should not be modified.

.github/workflows/check-general-formatting-task.yml

@@ -1,4 +1,4 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/master/workflow-templates/check-general-formatting-task.md
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-general-formatting-task.md
 name: Check General Formatting
 
 # See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows

workflow-templates/assets/check-general-formatting-task/Taskfile.yml

@@ -1,4 +1,4 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/master/workflow-templates/assets/check-general-formatting-task/Taskfile.yml
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-general-formatting-task/Taskfile.yml
 # See: https://taskfile.dev/#/usage
 version: "3"
 

workflow-templates/assets/shared/.editorconfig

@@ -1,4 +1,4 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/master/workflow-templates/assets/shared/.editorconfig
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/shared/.editorconfig
 # See: https://editorconfig.org/
 # The formatting style defined in this file is the official standardized style to be used in all Arduino Tooling
 # projects and should not be modified.

workflow-templates/check-general-formatting-task.yml

@@ -1,4 +1,4 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/master/workflow-templates/check-general-formatting-task.md
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-general-formatting-task.md
 name: Check General Formatting
 
 # See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows

workflow-templates/dependabot/workflow-template-copies/.github/workflows/check-general-formatting-task.yml

@@ -1,4 +1,4 @@
-# Source: https://github.com/arduino/tooling-project-assets/blob/master/workflow-templates/check-general-formatting-task.md
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-general-formatting-task.md
 name: Check General Formatting
 
 # See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows