Update contributing guidelines

CONTRIBUTING.md

@@ -1,8 +1,12 @@
 Contribution Guide Lines
 
-* Images must have descriptive file names in the following format:
-    File_Names_Are_Cool.png
+* __NSFW images aren't allowed due to [Github Site Policy](https://docs.github.com/en/site-policy);__
 
-* Add your images to the folder that best describes the subject matter of the book that the girl is holding. If no existing folder applies create a new one.
-    
-**No nudity (I really don't want to get banned)**
+* Pictures can't be related to cryptocurrency or its technologies;
+
+* Images must have descriptive file names in the following format (The file doesn't have to be "png" format, this is just an example):
+    Name_Name_Book_Book.png
+
+* Add your images to the folder that best describes the subject matter of the book that the girl is holding. If no existing folder applies create a new one, the simpler the name, the best;
+
+* All Characters must be female presenting (either canonically female or look/act like girls).

README.md

@@ -3,16 +3,13 @@ Anime Girls Holding Programming Books
 
 # Contribution Guidelines
 
-* NO CRYPTO(currency) GO AWAY
+* __NSFW images aren't allowed due to [Github Site Policy](https://docs.github.com/en/site-policy);__
 
-* Images must have descriptive file names in the following format:
+* Pictures can't be related to cryptocurrency or its technologies;
 
-    File_Names_Are_Cool.png
+* Images must have descriptive file names in the following format (The file doesn't have to be "png" format, this is just an example:
+    Name_Name_Book_Book.png
 
-* Add your images to the folder that best describes the subject matter of the book that the girl is holding. If no existing folder applies create a new one.
-
-* All characters added pretty much always must be female presenting, meaning that they are either canonically female or at least look and act like they're girls. 
-    
-* __No nudity (I really don't want to get banned)__
-    
+* Add your images to the folder that best describes the subject matter of the book that the girl is holding. If no existing folder applies create a new one, the simpler the name, the best;
 
+* All Characters must be female presenting (either canonically female or look/act like girls).