apacheGH-45157: [CI][Packaging] Remove explicit pins of gemfury version in dev/tasks/macros.jinja (apache#45158)

### Rationale for this change

This should fix a lot of CI jobs. See apache#45157.

### What changes are included in this PR?

Updated dev/tasks/macros.jinja to remove explicit version pin on the gemfury gem version.

### Are these changes tested?

Testing here.

### Are there any user-facing changes?

No.
* GitHub Issue: apache#45157

Authored-by: Bryce Mecum <petridish@gmail.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>

Author: amoeba

dev/tasks/macros.jinja

@@ -158,14 +158,12 @@ env:
   - name: Install gemfury client on ARM self-hosted
     if: runner.arch != 'X64'
     run: |
-      # GH-36692: Pin gemfury due to wrong faraday dependency declaration.
-      gem install --user-install gemfury -v 0.12.0
+      gem install --user-install gemfury
       ruby -r rubygems -e 'puts("#{Gem.user_dir}/bin")' >> $GITHUB_PATH
   - name: Install gemfury client
     if: runner.arch == 'X64'
     run: |
-      # GH-36692: Pin gemfury due to wrong faraday dependency declaration.
-      gem install gemfury -v 0.12.0
+      gem install gemfury
   - name: Upload package to Gemfury
     shell: bash
     run: |