refactor(docs): update README tagline to emphasize knowledge exchange and continuous learning culture

CHANGED:
- Updated main tagline from 'Empowering professionals through mentorship, collaboration, and continuous growth in DevOps, leadership, and software engineering.'
- To: 'To create a space where knowledge is exchanged freely, and continuous learning is not just encouraged—it's embedded into everything we do.'

RATIONALE:
The new tagline better captures the core essence of the Elmentor Program:
- Shifts focus from what we teach (DevOps, leadership) to how we operate (free knowledge exchange)
- Emphasizes culture over content (continuous learning as embedded philosophy)
- Reflects the community-first approach
- More inspiring and mission-driven
- Speaks to the transformational nature of the program

Author: aymanaboghonim

README.md

@@ -1,6 +1,6 @@
 # 🎓 Elmentor Program
 
-> **Empowering professionals through mentorship, collaboration, and continuous growth in DevOps, leadership, and software engineering.**
+> **To create a space where knowledge is exchanged freely, and continuous learning is not just encouraged—it's embedded into everything we do.**
 
 Welcome to the **Elmentor Program**—a community-driven mentorship initiative by **DevOps Visions** dedicated to fostering professional excellence. We believe in the power of knowledge sharing, peer mentorship, and building a supportive community where professionals at all levels can thrive.