Fix minor typos in README

[josiahaltschuler]

• Changed "synchronized" to "synchronize" in the sentence, "This tool can be used to synchronized your schema from Azure Data Explorer (Kusto) cluster to yml files in a GitHub repository and back, using GitHub Actions."
• Removed unfinished sentence, "In the repo"
• Removed the word "the" in the sentence, "KustoSchemaTools uses plugins for reading the and writing the schema from or to a database or yaml file. You can find more docs on that in the KustoSchemaTools repo."
• Changed "examle" to "example" in the sentence, "Implement your own plugins (examle)."