Change all www.gisaid.org to gisaid.org` [#1133]

GISAID is returning 301 on `www.gisaid.org` links, so let's respect it
and update our URLs.

Also correct some URLs to where they ultimately redirect.

docs/src/guides/data-prep/gisaid-search.rst

@@ -9,7 +9,7 @@ The following instructions describe how to curate data for a region-specific ana
 Login to GISAID
 ---------------
 
-Navigate to `GISAID (gisaid.org) <https://www.gisaid.org/>`__ and select the “Login” link.
+Navigate to `GISAID (gisaid.org) <https://gisaid.org/>`__ and select the “Login” link.
 
 .. figure:: ../../images/gisaid-homepage.png
    :alt: GISAID homepage with login link

docs/src/reference/metadata-fields.rst

@@ -21,7 +21,7 @@ Name of the pathogen.
 Column 3: ``gisaid_epi_isl``
 --------------------------------------
 
-If this genome is shared via `GISAID <https://www.gisaid.org/>`__ then please include the EPI ISL here. In our example this is ``EPI_ISL_413490``.
+If this genome is shared via `GISAID <https://gisaid.org/>`__ then please include the EPI ISL here. In our example this is ``EPI_ISL_413490``.
 
 Column 4: ``genbank_accession``
 --------------------------------------
@@ -112,12 +112,12 @@ Sex of the patient from whom the sample was collected. This will show up in ausp
 Column 18: ``originating_lab``
 --------------------------------------
 
-Please see `GISAID <https://www.gisaid.org/help/publish-with-gisaid-references/>`__ for more information.
+Please see `GISAID <https://gisaid.org/publish/>`__ for more information.
 
 Column 19: ``submitting_lab``
 --------------------------------------
 
-Please see `GISAID <https://www.gisaid.org/help/publish-with-gisaid-references/>`__ for more information.
+Please see `GISAID <https://gisaid.org/publish/>`__ for more information.
 
 Column 20: ``authors``
 --------------------------------------
@@ -127,7 +127,7 @@ Author of the genome sequence, or the paper which announced this genome. Typical
 Column 21: ``url``
 --------------------------------------
 
-The URL, if available, pointing to the genome data. For most SARS-CoV-2 data this is https://www.gisaid.org.
+The URL, if available, pointing to the genome data. For most SARS-CoV-2 data this is https://gisaid.org.
 
 Column 22: ``title``
 --------------------------------------

docs/src/tutorial/custom-data.rst

@@ -30,7 +30,7 @@ Curate data from GISAID
 
 We will retrieve 10 sequences from GISAID's EpiCoV database.
 
-1. Navigate to `GISAID <https://www.gisaid.org/>`__ and select **Login**.
+1. Navigate to `GISAID <https://gisaid.org/>`__ and select **Login**.
 
    .. image:: ../images/gisaid-homepage.png
       :width: 400

docs/src/tutorial/genomic-surveillance.rst

@@ -15,7 +15,7 @@ Prerequisites
 -------------
 
 1. :doc:`custom-data`. This tutorial introduces concepts expanded by the following tutorial.
-2. `Register for a GISAID account <https://www.gisaid.org/registration/>`_, if you do not have one yet. However, registration may take a few days. Follow :doc:`alternative data preparation methods <../guides/data-prep/index>` in place of :ref:`genomic-surveillance-curate-data-from-gisaid`, if you wish to continue the following tutorial in the meantime.
+2. `Register for a GISAID account <https://gisaid.org/registration/>`_, if you do not have one yet. However, registration may take a few days. Follow :doc:`alternative data preparation methods <../guides/data-prep/index>` in place of :ref:`genomic-surveillance-curate-data-from-gisaid`, if you wish to continue the following tutorial in the meantime.
 
 Setup
 -----
@@ -33,7 +33,7 @@ Curate data from GISAID
 
 We will download a focal set of Idaho sequences from GISAID's EpiCoV database.
 
-1. Navigate to `GISAID <https://www.gisaid.org/>`__, **Login**, and go to **EpiCoV** > **Search**.
+1. Navigate to `GISAID <https://gisaid.org/>`__, **Login**, and go to **EpiCoV** > **Search**.
 
    .. image:: ../images/gisaid-epicov-search.png
       :width: 400

docs/src/tutorial/setup.rst

@@ -10,7 +10,7 @@ Register for a GISAID account
 -----------------------------
 
 Some tutorials rely on data downloaded from `GISAID <https://gisaid.org/>`_.
-If you do not already have one, `register for a GISAID account <https://www.gisaid.org/registration/>`_ now.
+If you do not already have one, `register for a GISAID account <https://gisaid.org/registration/>`_ now.
 Registration may take a few days.
 
 Install Nextstrain components