Merge bitcoin/bitcoin#30630: doc: Update ccache website link

fec74a8 doc: Update ccache website link (Hennadii Stepanov)

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Tree-SHA512: 1331b6d37d1bfc124bbce08bb584235c0610671655d7a4a82882aba2aa73c3c741dce013e6ce9baba00a07bc26d4a9c5aa8da4abd38187ffe7b8a101e2366bda

Author: fanquake

doc/productivity.md

@@ -33,7 +33,7 @@ The easiest way to faster compile times is to cache compiles. `ccache` is a way
 
 Install `ccache` through your distribution's package manager, and run `./configure` with your normal flags to pick it up.
 
-To use ccache for all your C/C++ projects, follow the symlinks method [here](https://ccache.samba.org/manual/latest.html#_run_modes) to set it up.
+To use ccache for all your C/C++ projects, follow the symlinks method [here](https://ccache.dev/manual/latest.html#_run_modes) to set it up.
 
 To get the most out of ccache, put something like this in `~/.ccache/ccache.conf`: