Release: Bump version to 10.3.0-pre (#76742)

"Release: Updated versions in package to 10.3.0-pre"

Co-authored-by: grafana-delivery-bot[bot] <132647405+grafana-delivery-bot[bot]@users.noreply.github.com>

packages/grafana-data/package.json

@@ -2,7 +2,7 @@
   "author": "Grafana Labs",
   "license": "Apache-2.0",
   "name": "@grafana/data",
-  "version": "10.3.0",
+  "version": "10.3.0-pre",
   "description": "Grafana Data Library",
   "keywords": [
     "typescript"
@@ -36,7 +36,7 @@
   },
   "dependencies": {
     "@braintree/sanitize-url": "6.0.2",
-    "@grafana/schema": "10.3.0",
+    "@grafana/schema": "10.3.0-pre",
     "@types/d3-interpolate": "^3.0.0",
     "@types/string-hash": "1.1.1",
     "d3-interpolate": "3.0.1",