fix several instances of "3nd"->"3rd"

Signed-off-by: Chad Dougherty <[email protected]>

Author: Chad Dougherty

_posts/2019-10-04-SC19.md

@@ -29,7 +29,7 @@ US-RSE and UK-RSE leaders will be involved in these sessions as leaders and pane
 #### Monday, Nov. 18
 -  __Tutorial__: [Better Scientific Software](https://sc19.supercomputing.org/?post_type=page&p=3479&id=tut158&sess=sess192)
 -  __Tutorial__: [Managing HPC Software Complexity with Spack](https://sc19.supercomputing.org/?post_type=page&p=3479&id=tut164&sess=sess194)
--  __Workshop__: [3nd International Workshop on Software Correctness for HPC Applications (Correctness 2019)](https://sc19.supercomputing.org/?post_type=page&p=3480&sess=sess118)
+-  __Workshop__: [3rd International Workshop on Software Correctness for HPC Applications (Correctness 2019)](https://sc19.supercomputing.org/?post_type=page&p=3480&sess=sess118)
 -  __Students@SC__: [Modern Software Design, Tools, and Practices](https://sc19.supercomputing.org/?post_type=page&p=3479&id=pec109&sess=sess410)
 
 #### Tuesday, Nov. 19

_posts/newsletters/2024-01-24-newsletter.md

@@ -248,7 +248,7 @@ The [Sustainable Scientific Software Conference](https://s3c.sandia.gov/) will t
 
 ## SciPy 2024
 
-The [23nd annual SciPy conference](https://www.scipy2024.scipy.org/) will be held July 8-14 in Tacoma, WA at the Tacoma Convention Center. 
+The [23rd annual SciPy conference](https://www.scipy2024.scipy.org/) will be held July 8-14 in Tacoma, WA at the Tacoma Convention Center.
 
 SciPy brings together attendees from industry, academia and government to showcase their latest projects, learn from skilled users and developers, and collaborate on code development. 
 

_posts/newsletters/2024-02-29-newsletter.md

@@ -374,7 +374,7 @@ The [Sustainable Scientific Software Conference](https://s3c.sandia.gov/) will t
 
 ## SciPy 2024
 
-The [23nd annual SciPy conference](https://www.scipy2024.scipy.org/) will be held July 8-14 in Tacoma, WA at the Tacoma Convention Center. 
+The [23rd annual SciPy conference](https://www.scipy2024.scipy.org/) will be held July 8-14 in Tacoma, WA at the Tacoma Convention Center.
 
 SciPy brings together attendees from industry, academia and government to showcase their latest projects, learn from skilled users and developers, and collaborate on code development.