Fix doc CI 🤞 (#3085)

* Fix linkchecking and page title
* Add DOI to citation template
* Update author list

Author: JDBetteridge

AUTHORS.rst

@@ -164,5 +164,7 @@ Connor J. Ward................<https://www.imperial.ac.uk/people/c.ward20>
 
 Florian Wechsung..............<https://florianwechsung.github.io>
 
+Yian Zeng
+
 Fangyi Zhou
 

docs/source/citation.rst_t

@@ -17,6 +17,7 @@ If you publish results using Firedrake, we would be grateful if you would cite t
     edition      = {First edition},
     year         = {2023},
     month        = {5},
+    doi          = {10.25561/104839},
   }
 
 The simplest way to determine any additional relevant papers to cite is by asking Firedrake itself. You can ask that a list of citations relevant to your computation be printed when exiting by calling `Citations.print_at_exit` after importing Firedrake::
@@ -33,3 +34,4 @@ Archiving your code with Zenodo
 -------------------------------
 
 In order to make your simulation results traceable and reproducible, we can provide you with a citeable archive of the exact version of Firedrake and its key dependencies that you used in your simulations. For information on how to do this see https://firedrakeproject.org/zenodo.html.
+

docs/source/fenics_15.rst

@@ -105,11 +105,11 @@ FEniCS '15 is supported by:
 
 .. |NERC| image:: /images/nerc.*
   :height: 60px
-  :target: http://www.nerc.ac.uk
+  :target: https://www.ukri.org/councils/nerc/
 
 .. |EPSRC| image:: /images/epsrc.*
   :height: 60px
-  :target: http://www.epsrc.ac.uk
+  :target: https://www.ukri.org/councils/epsrc/
 
 .. |Imperial College London| image:: /images/imperial.*
   :height: 60px

docs/source/funding.rst

@@ -1,6 +1,6 @@
 .. title: Funding
 
-.. only:: html
+.. only:: html or linkcheck
 
   Firedrake is supported by:
   --------------------------
@@ -12,11 +12,11 @@
 
 .. |NERC| image:: /images/nerc.*
   :height: 60px
-  :target: http://www.nerc.ac.uk
+  :target: https://www.ukri.org/councils/nerc/
 
 .. |EPSRC| image:: /images/epsrc.*
   :height: 60px
-  :target: http://www.epsrc.ac.uk
+  :target: https://www.ukri.org/councils/epsrc/
 
 .. |Imperial College London| image:: /images/imperial.*
   :height: 60px