Solved Shortest Bridge [LeetCode 934 | Graph | Medium] and update Readme.md

[SaumiaSinghal]

Solution of Shortest Bridge [LeetCode 934 | Graph | Medium]

Addresses Issue #11

Approach: DFS + BFS Solution
Time Complexity: O(V)
Space Complexity: O(V)

Posted solution on Discuss page in LeetCode: https://leetcode.com/problems/shortest-bridge/discuss/870700/c-dfs-bfs-beats-98

The solution passes all test cases of LeetCode and beats 98% of the solutions

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• Added problem & solution under correct topic.
• Specified Space & Time complexity.
• Specified difficulty level, tag & Note(if any).

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• My code follows the style guidelines of this project
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• Any dependent changes have been merged and published in downstream modules

[SaumiaSinghal]

Hi @GouravRusiya30! I fixed the conflict issues. Can you please check, next time, I'll make a single PR