Minor fixes in documentation links

[miguelmaso]

Changelog

• Added logo to docs page
• Fixed images links
• Removed shields form docs

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	72f508d...	main / 72f508d...
Constitutive models/Visco-elastic Ψ	0.0343 ± 0.013 ms	0.034 ± 0.013 ms	1.01 ± 0.54
Constitutive models/Visco-elastic ∂Ψu	31.4 ± 4 μs	31 ± 3.7 μs	1.01 ± 0.17
Constitutive models/Visco-elastic ∂Ψuu	0.0598 ± 0.023 ms	0.0591 ± 0.022 ms	1.01 ± 0.55
Simulations/StaticMechanicalDirichlet	0.209 ± 0.018 s	0.211 ± 0.016 s	0.99 ± 0.11
Simulations/StaticMechanicalNeumann	0.157 ± 0.017 s	0.154 ± 0.016 s	1.02 ± 0.15
Simulations/ViscoElastic	12.4 s	12.3 s	1.01
Tensor algebra/Cofactor	0.059 ± 0.002 μs	0.059 ± 0.002 μs	1 ± 0.048
Tensor algebra/Det(A)Inv(A')	0.106 ± 0.004 μs	0.103 ± 0.003 μs	1.03 ± 0.049
Tensor algebra/δδ_λ_2d	19 ± 1 ns	19 ± 1 ns	1 ± 0.074
Tensor algebra/δδ_μ_2d	19 ± 1 ns	19 ± 1 ns	1 ± 0.074
time_to_load	2.69 ± 0.03 s	2.75 ± 0.055 s	0.98 ± 0.022

Memory benchmarks

	main	72f508d...	main / 72f508d...
Constitutive models/Visco-elastic Ψ	0.542 k allocs: 0.0443 MB	0.542 k allocs: 0.0443 MB	1
Constitutive models/Visco-elastic ∂Ψu	0.593 k allocs: 0.0492 MB	0.593 k allocs: 0.0492 MB	1
Constitutive models/Visco-elastic ∂Ψuu	1.02 k allocs: 0.0839 MB	1.02 k allocs: 0.0839 MB	1
Simulations/StaticMechanicalDirichlet	1.51 M allocs: 0.108 GB	1.51 M allocs: 0.108 GB	1
Simulations/StaticMechanicalNeumann	1.48 M allocs: 0.0927 GB	1.48 M allocs: 0.0927 GB	1
Simulations/ViscoElastic	0.162 G allocs: 12.7 GB	0.162 G allocs: 12.7 GB	1
Tensor algebra/Cofactor	1 allocs: 0.0781 kB	1 allocs: 0.0781 kB	1
Tensor algebra/Det(A)Inv(A')	4 allocs: 0.25 kB	4 allocs: 0.25 kB	1
Tensor algebra/δδ_λ_2d	0 allocs: 0 B	0 allocs: 0 B
Tensor algebra/δδ_μ_2d	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.149 k allocs: 11.1 kB	0.149 k allocs: 11.1 kB	1