Update cheatsheets

tldr/git-diff

@@ -24,9 +24,9 @@ source: https://github.com/tldr-pages/tldr.git
 
 `git diff 'HEAD@{3 months|weeks|days|hours|seconds ago}'`
 
-- Show only names of changed files since a given commit:
+- Show diff statistics, like files changed, histogram, and total line insertions/deletions:
 
-`git diff --name-only {{commit}}`
+`git diff --stat {{commit}}`
 
 - Output a summary of file creations, renames and mode changes since a given commit:
 

tldr/nuclei

@@ -6,9 +6,9 @@ source: https://github.com/tldr-pages/tldr.git
 # nuclei
 
 > Fast and customizable vulnerability scanner based on a simple YAML based DSL.
-> More information: <https://github.com/projectdiscovery/nuclei>.
+> More information: <https://docs.projectdiscovery.io/tools/nuclei/overview>.
 
-- [u]pdate `nuclei` [t]emplates to the latest released version:
+- [u]pdate `nuclei` [t]emplates to the latest released version (will be downloaded to `~/nuclei-templates`):
 
 `nuclei -ut`