Update hex logo format in README.md

Author: munoztd0

README.md

@@ -1,6 +1,6 @@
 # hotpatchR
 
-[![hotpatchR hex logo](inst/hex/hotpatchR-hex.svg)](inst/hex/hotpatchR-hex.svg)
+[![hotpatchR hex logo](inst/hex/hotpatchR-hex.png)](inst/hex/hotpatchR-hex.png)
 
 [![R-CMD check](https://github.com/munoztd0/hotpatchR/actions/workflows/r-cmd-check.yaml/badge.svg)](https://github.com/munoztd0/hotpatchR/actions/workflows/r-cmd-check.yaml)
 [![pkgdown](https://github.com/munoztd0/hotpatchR/actions/workflows/pkgdown.yaml/badge.svg)](https://github.com/munoztd0/hotpatchR/actions/workflows/pkgdown.yaml)