[Fix]: uppercase input is not found by Word Frequency Finder

[David-Pena]

Describe the bug
If you want to find Hello you have to type it hello, because otherwise the word will not be count.

To Reproduce
Having this sample text:

The Word Frequency Finder Tool helps users analyze their text by calculating the frequency of specific words. You can input any text and specify the words to check their occurrences. It is an essential tool for content analysis, helping to ensure the right emphasis is placed on important words.

Input: "Frequency" | Result: 0
Input: "frequency" | Result: 2

Expected behavior
Both cases should output the same result: 2

Screenshots
N/A

Desktop (please complete the following information):

• OS [Windows]
• Browser [Arc]
• Version [1.29.0]

Additional context
N/A

[David-Pena]

Hi @rahul-vashishtha I created a PR for this #2