Made changes under meta elements and added bootstrap link

[Sharly-Atieno]

Hi @Girija-Rajendran

Please review and merge the PRs,

Title	Description
Category	Keyword Tracking
Keywords	React Diagram
Position	6FT
UG PR	#502
Task	https://dev.azure.com/Syncfusion-Infrastructure/Syncfusion%20SEO/_workitems/edit/187117/
Content Ticket	NA
UX Ticket	NA
Reference	Keyword Tracking - 2023, 2024.xlsx

Changes made	Reason for changes
Modified meta elements	To improve page performance
Changed material link to bootstrap	Material link takes lots of time to load in a page

Regards,
Sharly A.

[Syncfusion-CI]

Build Status: INPROGRESS 🔃
Build Location: SEO-185485-React-Diagram-UG-Changes

[SyncfusionBuild]

CI Status: SUCCESS ✅
Source Compilation: SUCCESS ✅
Build Location: SEO-185485-React-Diagram-UG-Changes
Technical Error(s): 0
Spelling Error(s): 0
Image Alt Text Error(s): 0
Image Size Error(s): 0
Image Name Error(s): 0
FT Layout Syntax Error(s): 0
Front matter Error(s): 0
File Path Error(s): 0
CodeSnippet File Path Missing Error(s): 0
Toc Anchor Tags Validation Error(s): 0