sagemathgh-38485: Updated SPKG links for polymake as per sagemath#37532

    
This PR updates the SPKG links for the `polymake` package in the
documentation. The goal is to provide users with direct links to the
Sage Reference Manual for installing optional packages, as suggested in
issue sagemath#37532.

**Changes Made:**
- Replaced ad-hoc package installation instructions with links to the
SPKG pages for packages like `4ti2`, `latte_int`, `topcom`, and `qhull`.
- Updated instructions to include links for additional software and the
`jupymake` package.
- Provided instructions for debugging installation problems.

**Why is this change required?**
This change aligns the documentation with the latest recommendations and
practices for installing optional packages in Sage, making it easier for
users to find and follow the correct installation instructions.

**Issue Reference:**
- Resolves issue
[sagemath#37532](https://github.com/YourRepo/YourProject/issues/37532).

### 📝 Checklist

- [x] The title is concise and informative.
- [x] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

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URL: sagemath#38485
Reported by: Anant Shukla
Reviewer(s):

build/pkgs/polymake/SPKG.rst

@@ -50,25 +50,28 @@ you will need the ``local::lib`` Perl module installed::
 
    cpan -i XML::Writer XML::LibXML XML::LibXSLT File::Slurp Term::ReadLine::Gnu JSON SVG MongoDB
 
-Several Sage packages should be installed before installing the ``polymake``
-package to give a more featureful Polymake installation::
+Before installing the ``polymake`` package, refer to the SPKG pages for the following packages to ensure a more featureful Polymake installation:
 
-   sage -i 4ti2 latte_int topcom qhull
+- [4ti2](https://doc.sagemath.org/html/en/reference/spkg/4ti2.html)
+- [latte_int](https://doc.sagemath.org/html/en/reference/spkg/latte_int.html)
+- [topcom](https://doc.sagemath.org/html/en/reference/spkg/topcom.html)
+- [qhull](https://doc.sagemath.org/html/en/reference/spkg/qhull.html)
 
-Software that would need to be installed manually (no Sage package
-available) for a more featureful Polymake installation: ``azove``, ``porta``,
-``vinci``, ``SplitsTree4``.
+For additional software that may enhance your Polymake installation (but for which no Sage package is available), you can manually install the following:
+
+- ``azove``
+- ``porta``
+- ``vinci``
+- ``SplitsTree4``
 
 Information on missing Polymake prerequisites after installing polymake::
 
    $ sage -sh
    (sage-sh) $ polymake
    polytope> show_unconfigured;
 
-In order to use Polymake from Sage, you will also need the ``jupymake``
-package::
+In order to use Polymake from Sage, please refer to the [Jupymake SPKG page](https://doc.sagemath.org/html/en/reference/spkg/jupymake.html) for installation instructions.
 
-  sage -i jupymake
 
 
 Debugging polymake install problems