gnu: zola: Explicitly install the binary.

* gnu/packages/rust-apps.scm (zola)[arguments]<#:phases>{install}:
Replace by phase copying the executable.

Fixes: guix/guix#4371
Change-Id: I9da509650ca80e96c0a41c623eada1ad8a76dafb
Signed-off-by: Andreas Enge <andreas@enge.fr>

gnu/packages/rust-apps.scm

@@ -4154,6 +4154,10 @@ and users are in full control of their data and workflow.")
         (ice-9 match))
       #:phases
       #~(modify-phases %standard-phases
+         (replace 'install
+           (lambda _
+             (let ((bin (string-append #$output "/bin")))
+               (install-file "target/release/zola" bin))))
           (add-after 'install 'install-completions
             (lambda* (#:key native-inputs #:allow-other-keys)
               (for-each