git-delete-tag: add page

[CleanMachine1]

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

For #5137

[tldr-bot]

The build for this PR failed with the following error(s):

pages/common/git-delete-tag.md:
Error: Parse error on line 4:
...b.com/tj/git-extras>- Delete a tag:`
-----------------------^
Expecting 'END_INFORMATION_LINK_URL', got 'NEWLINE'
pages/common/git-delete-tag.md:4: TLDR011 Page never contains more than a single empty line

Please fix the error(s) and push again.

[patricedenis]

Ok for me.
Nice thank you @CleanMachine1