docs: Fix Typographical Errors in spring-ai-docs

[cowboysj]

Related Issues[#1544]

Description

• Corrected "what it" to "what is" in bedrock-cohere.adoc.
• Corrected "1st" and "supportted" to "supported" in anthropic-chat-function.adoc.
• Corrected "can some" and "can can" in azure-open-ai-chat.adoc.
• Corrected "opean" to "open" in azure-openai-chat.adoc.
• Corrected "Yur" to "Your" in azure-openai-chat.adoc.
• Corrected "o" to "on" in vertexai-gemini-chat.adoc.

[tzolov]

Thank you @cowboysj