docs: improve style for README (#250)

README.md

@@ -10,14 +10,14 @@ The description in **English** is available on the following blog page. -> [Blog
 
 CLI tool to search AWS Lambda runtime values and versions.
 
-By filtering by **regions, runtime and versions, or part of the function name**, you can find a list of functions **across regions**.
+By filtering by regions, runtime and versions, or part of the function name, you can find a list of functions **across regions**.
 
 This will allow you can see the following.
 
 - What Lambda functions exist in which regions
-- Whether there are any functions that **have reached EOL**
-- Whether there is a function in **an unexpected region**
-- Whether a function exists based on **a specific naming rule**
+- Whether there are any functions that have reached EOL
+- Whether there is a function in an unexpected region
+- Whether a function exists based on a specific naming rule
 
 Also this tool can support output results **as a CSV file.**