Remove redundant ts:install-deps task

Previously a task named ts:install-deps was used to install the npm-managed dependencies of the project. At the time the
task was added, npm was used to manage the action's TypeScript code dependencies as well as TypeScript-specific
development tool dependencies. For this reason, it seemed reasonable to use the "ts" prefix on the task name to place it
under the TypeScript "namespace" of tasks.

In addition to the TypeScript-specific dependencies, npm is now used to manage tool dependencies for general management
of the project not specific to TypeScript. For this reason, and because it is now the standardized task name used by the
reusable "template" assets, it is better to use the task with the more appropriate "npm" prefix.

Author: per1234

Taskfile.yml

@@ -249,34 +249,29 @@ tasks:
   ts:build:
     desc: Build the action's TypeScript code.
     deps:
-      - task: ts:install-deps
+      - task: npm:install-deps
     cmds:
       - npx tsc
       - npx ncc build
 
   ts:fix-lint:
     desc: Fix TypeScript code linting violations
     deps:
-      - task: ts:install-deps
+      - task: npm:install-deps
     cmds:
       - npx eslint --ext .js,.jsx,.ts,.tsx --fix .
 
-  ts:install-deps:
-    desc: Install TypeScript dependencies
-    deps:
-      - task: npm:install-deps
-
   ts:lint:
     desc: Lint TypeScript code
     deps:
-      - task: ts:install-deps
+      - task: npm:install-deps
     cmds:
       - npx eslint --ext .js,.jsx,.ts,.tsx .
 
   ts:test:
     desc: Test the action's TypeScript code.
     deps:
-      - task: ts:install-deps
+      - task: npm:install-deps
     cmds:
       - npx jest