patch docs with proper input for OpenAI compatible embeddings

resolves #2801

server/endpoints/api/openai/index.js

@@ -207,7 +207,7 @@ function apiOpenAICompatibleEndpoints(app) {
           content: {
             "application/json": {
               example: {
-                input: [
+                inputs: [
                 "This is my first string to embed",
                 "This is my second string to embed",
                 ],

server/swagger/openapi.json

@@ -3120,7 +3120,7 @@
           "content": {
             "application/json": {
               "example": {
-                "input": [
+                "inputs": [
                   "This is my first string to embed",
                   "This is my second string to embed"
                 ],