Fixes to 2013/cable1/README.md

Although I already checked formatting the tweet of Landon's that was
referred to was not on the Internet Wayback Machine so instead I took a
screenshot of the tweet and embedded it into the README.md file so that
when generated as a html file it will show the tweet instead (dark mode
because I don't like light backgrounds).

BTW: the author said: 'prejudge the past' but how can one prejudge the
past? I suggest a new word: postjudge :-)

(No this does not technically ignore the definition as it refers to
PRE-maturely AND without adequate information :-) but even if it did
that's far less fun! Of course it could be judging before seeing it but
this is also much less fun :-) )

2013/cable1/README.md

@@ -69,10 +69,12 @@ A PC guy as expected.  What about that other Steve?
 ```
 
 Humm .. maybe there is a hidden reason he is leaving the late Micro$oft? :-)
-Why late?  See [this tweet](https://twitter.com/landonnoll/status/401582967123742720).
+Why late? Because:
+
+![tweet about M$ being dead](https://twitter.com/landonnoll/status/401582967123742720)
 
 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-An important 2023 update to this historic note:
+An important 2023 update about twitter:
 
 The IOCCC no longer uses twitter.  Today the IOCCC uses Mastodon.
 For more information and to see our IOCCC Mastodon posts, see: