Update cheatsheets

tldr/linux/gif2webp

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gif2webp
+
+> Convert a GIF image to WebP.
+> More information: <https://developers.google.com/speed/webp/docs/gif2webp>.
+
+- Convert a GIF image to WebP:
+
+`gif2webp {{path/to/image.gif}} -o {{path/to/image.webp}}`

tldr/linux/ifstat

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ifstat
+
+> View network interface statistics.
+> More information: <https://manned.org/ifstat>.
+
+- View network interface statistics since last query:
+
+`ifstat`
+
+- View network interface statistics since last boot:
+
+`ifstat {{-a|--ignore}}`
+
+- View error rate:
+
+`ifstat {-e|--errors}}`

tldr/linux/img2webp

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# img2webp
+
+> Convert an image to WebP.
+> More information: <https://developers.google.com/speed/webp/docs/img2webp>.
+
+- Convert an image to WebP:
+
+`img2webp {{path/to/image}} -o {{path/to/image.webp}}`

tldr/linux/zdump

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# zdump
+
+> Print timezone information.
+> More information: <https://manned.org/zdump>.
+
+- Print the current time in a timezone:
+
+`zdump {{timezone}}`
+
+- Display help:
+
+`zdump --help`