chore: update '@ts-dspy/core' dependency version in package.json files

### Changes
- Changed the dependency reference for '@ts-dspy/core' from 'workspace:*' to '^0.2.5' in the package.json files of the gemini and openai packages.

Author: ardada2468

packages/gemini/package.json

@@ -20,7 +20,7 @@
     },
     "dependencies": {
         "@google/generative-ai": "^0.2.1",
-        "@ts-dspy/core": "workspace:*"
+        "@ts-dspy/core": "^0.2.5"
     },
     "devDependencies": {
         "@rollup/plugin-node-resolve": "^15.0.0",

packages/openai/package.json

@@ -19,7 +19,7 @@
     "clean": "rm -rf dist"
   },
   "dependencies": {
-    "@ts-dspy/core": "workspace:*"
+    "@ts-dspy/core": "^0.2.5"
   },
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^15.0.0",