Update initial_idea_template.md

Author: ashitaprasad

doc/proposals/2025/gsoc/templates/initial_idea_template.md

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+## Instructions
+
+- Create a fork of API Dash.
+- In the folder [doc/proposals/2025/gsoc](https://github.com/foss42/apidash/tree/main/doc/proposals/2025/gsoc) create a file named `idea_<your name>_<short project name>.md`
+
+The file template is as follow:
+
+```
+### Initial Idea Submission
+
+Full Name:   
+University name:   
+Program you are enrolled in (Degree & Major/Minor):   
+Year:   
+Expected graduation date:  
+
+Project Title: <Write your idea title>  
+Relevant issues: <Add links to the relevant issues>  
+
+Idea description:
+<Write you thoughts below discussing your approach and how will you implement it>
+
+```
+
+Feel free to add images by adding it to the `images` folder inside [doc/proposals/2025/gsoc](https://github.com/foss42/apidash/tree/main/doc/proposals/2025/gsoc) and linking it to your doc.