Update cheatsheets

tldr/linux/dnf-versionlock

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dnf versionlock
+
+> Protect packages from updates to newer versions.
+> Not default to `dnf` but supported via `dnf-plugins-core`.
+> See also: `dnf`.
+> More information: <https://dnf-plugins-core.readthedocs.io/en/latest/versionlock.html>.
+
+- List the current versionlock entries:
+
+`dnf versionlock`
+
+- Add a versionlock for all available packages matching the spec:
+
+`dnf versionlock add {{package}}`
+
+- Add an exclude (within versionlock) for the available packages matching the spec:
+
+`dnf versionlock exclude {{package}}`
+
+- Remove any matching versionlock entries:
+
+`dnf versionlock delete {{package}}`
+
+- Remove all versionlock entries:
+
+`dnf versionlock clear`