Increase OBS text font size from 72 to 84

- Bumped font size for better visibility of team name text overlays in OBS
- Applied to both text source creation and update scenarios

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lib/obsClient.js

@@ -323,7 +323,7 @@ async function createTextSource(sceneName, textSourceName, text) {
         text,
         font: {
           face: 'Arial',
-          size: 72,
+          size: 84,
           style: 'Bold'
         },
         color: 0xFFFFFFFF, // White text
@@ -352,7 +352,7 @@ async function createTextSource(sceneName, textSourceName, text) {
         text,
         font: {
           face: 'Arial',
-          size: 72,
+          size: 84,
           style: 'Bold'
         },
         color: 0xFFFFFFFF, // White text