Update Dependancies.md

Dependancies.md

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 # Dependencies
 
 ### `watermark.py`
 * ImageMagick 7.0.10-33
 * Ghostscript 9.53.3
-* Pillow
-* Wand
+* Pillow 8.1.0
+* Wand 0.6.5
 * PyPDF2 1.26.0
 
 ### `encrypt.py`:
 
 * PyPDF2 1.26.0
-* pwgen
-* pikepdf
+* pwgen 0.8.2.post0
+* pikepdf 2.5.0
 
 ### `preparemoodle.py`: