doc: fix typo in technical-priorities.md

`heap dumps` spelled as `headumps`

PR-URL: nodejs#41694
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

doc/contributing/technical-priorities.md

@@ -79,7 +79,7 @@ project work towards well understood and defined processes for observing
 the behavior of Node.js applications as well as ensuring there are well
 supported tools to implement those processes (logging, metrics and tracing).
 This includes support within the Node.js runtime itself (for example
-generating headumps, performance metrics, etc.) as well as support for
+generating heap dumps, performance metrics, etc.) as well as support for
 applications on top of the runtime. In addition, it is also important to clearly
 document the use cases, problem determination methods and best
 practices for those tools.