Update cheatsheets

yq

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# yq
+
+> A lightweight and portable command-line YAML processor.
+> More information: <https://mikefarah.gitbook.io/yq/>.
+
+- Output a YAML file, in pretty-print format (v4+):
+
+`yq eval {{path/to/file.yaml}}`
+
+- Output a YAML file, in pretty-print format (v3):
+
+`yq read {{path/to/file.yaml}} --colors`
+
+- Output the first element in a YAML file that contains only an array (v4+):
+
+`yq eval '.[0]' {{path/to/file.yaml}}`
+
+- Output the first element in a YAML file that contains only an array (v3):
+
+`yq read {{path/to/file.yaml}} '[0]'`
+
+- Set (or overwrite) a key to a value in a file (v4+):
+
+`yq eval '.{{key}} = "{{value}}"' --inplace {{path/to/file.yaml}}`
+
+- Set (or overwrite) a key to a value in a file (v3):
+
+`yq write --inplace {{path/to/file.yaml}} '{{key}}' '{{value}}'`
+
+- Merge two files and print to `stdout` (v4+):
+
+`yq eval-all 'select(filename == "{{path/to/file1.yaml}}") * select(filename == "{{path/to/file2.yaml}}")' {{path/to/file1.yaml}} {{path/to/file2.yaml}}`
+
+- Merge two files and print to `stdout` (v3):
+
+`yq merge {{path/to/file1.yaml}} {{path/to/file2.yaml}} --colors`