Update CV with new contact info, projects, and tooling upgrades

Add phone number and Telegram contact, add Sky Garden project, add Go to
skills, update rendercv to v2.8 with avatar support, bump GitHub Actions
versions, and update date to Mar 2026.

.github/workflows/deploy-pages.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup Pages
-        uses: actions/configure-pages@v5
+        uses: actions/configure-pages@v6
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v4
@@ -33,4 +33,4 @@ jobs:
 
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5

.github/workflows/rendercv.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
-          python-version: "3.12"
+          python-version: "3.14"
 
       - name: Install RenderCV
         run: |