Update Secure360 URLs

Rakefile

@@ -54,7 +54,6 @@ task test: :build do
     ignore_status_codes: [403, 503, 999],
     ignore_urls: [
       # URL not resolving
-      'https://secure360.org',
       # URLs time out
       'https://research-repository.griffith.edu.au/bitstream/handle/10072/389308/Provan268657-Published.pdf?sequence=5',
       # URLs require authentication

_posts/2019-09-15-chaos-resilience-engineering.md

@@ -25,7 +25,7 @@ I'm giving a talk next Tuesday (9/24) at at the [September OWASP MSP Meeting](ht
 - [Engineering a Safer World](https://mitpress.mit.edu/books/engineering-safer-world)
 - [STAMP/STPA/CAST](https://psas.scripts.mit.edu/home/)
 - [Managing Risk and System Change](https://psychology.tcd.ie/postgraduate/msc-riskandchange/)
-- [Secure360](https://secure360.org)
+- [Secure360](https://www.secure360.org)
 
 ## Chaos & Resilience Engineering
 

_posts/2020-05-01-chaos-resilience-secure360.md

@@ -7,7 +7,7 @@ comments: true
 ---
 **Update:** by request, I've posted handouts for this talk [here]({% post_url 2020-05-07-secure360-handouts %}).
 
-I'm speaking at [Secure360](https://secure360.org) on May 5, 2020, presenting an updated version of ["*Chaos & Resilience Engineering*"](https://web.archive.org/web/20210806005515/https://secure360.org/session/john-benninghoff-chaos-resilience-engineering-my-journey/?conference=11809&date=20200505). As I've done [before]({% post_url 2019-09-15-chaos-resilience-engineering %}), I won't be posting copies of the slides. Instead, I'm posting an updated list of references from the talk here.
+I'm speaking at [Secure360](https://web.archive.org/web/20210806001614/https://secure360.org/) on May 5, 2020, presenting an updated version of ["*Chaos & Resilience Engineering*"](https://web.archive.org/web/20210806005515/https://secure360.org/session/john-benninghoff-chaos-resilience-engineering-my-journey/?conference=11809&date=20200505). As I've done [before]({% post_url 2019-09-15-chaos-resilience-engineering %}), I won't be posting copies of the slides. Instead, I'm posting an updated list of references from the talk here.
 
 *Note: this post includes some additional references that are not in the final version of the talk (italicized)*