Update cheatsheets

mogrify

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mogrify
+
+> Perform operations on multiple images, such as resizing, cropping, flipping, and adding effects.
+> Changes are applied directly to the original file. Part of ImageMagick.
+> More information: <https://imagemagick.org/script/mogrify.php>.
+
+- Resize all JPEG images in the directory to 50% of their initial size:
+
+`mogrify -resize {{50%}} {{*.jpg}}`
+
+- Resize all images starting with `DSC` to 800x600:
+
+`mogrify -resize {{800x600}} {{DSC*}}`
+
+- Convert all PNGs in the directory to JPEG:
+
+`mogrify -format {{jpg}} {{*.png}}`
+
+- Halve the saturation of all image files in the current directory:
+
+`mogrify -modulate {{100,50}} {{*}}`
+
+- Double the brightness of all image files in the current directory:
+
+`mogrify -modulate {{200}} {{*}}`