Update device-install scripts (#6267)

* fix example

* check for firmware- filename

* add powershell formatter setting

* add crlf for ps1

* formatting

* check for firmware- filename

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Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

.gitattributes

@@ -1,4 +1,5 @@
 * text=auto eol=lf
 *.{cmd,[cC][mM][dD]} text eol=crlf
 *.{bat,[bB][aA][tT]} text eol=crlf
+*.{ps1,[pP][sS]} text eol=crlf
 *.{sh,[sS][hH]} text eol=lf