fixup: update the links of FASTA and metadata in the README

Updates the links of the FASTA and metadata in the phylogenetic README.
This probably should have been part of the previous PR:

#40

phylogenetic/README.md

@@ -37,16 +37,16 @@ There is little redirection and each rule should be able to be reasoned with on
 
 This build starts by pulling preprocessed sequence and metadata files from: 
 
-* https://data.nextstrain.org/files/dengue/sequences_all.fasta.zst
-* https://data.nextstrain.org/files/dengue/metadata_all.tsv.zst
-* https://data.nextstrain.org/files/dengue/sequences_denv1.fasta.zst
-* https://data.nextstrain.org/files/dengue/metadata_denv1.tsv.zst
-* https://data.nextstrain.org/files/dengue/sequences_denv2.fasta.zst
-* https://data.nextstrain.org/files/dengue/metadata_denv2.tsv.zst
-* https://data.nextstrain.org/files/dengue/sequences_denv3.fasta.zst
-* https://data.nextstrain.org/files/dengue/metadata_denv3.tsv.zst
-* https://data.nextstrain.org/files/dengue/sequences_denv4.fasta.zst
-* https://data.nextstrain.org/files/dengue/metadata_denv4.tsv.zst
+* https://data.nextstrain.org/files/workflows/dengue/sequences_all.fasta.zst
+* https://data.nextstrain.org/files/workflows/dengue/metadata_all.tsv.zst
+* https://data.nextstrain.org/files/workflows/dengue/sequences_denv1.fasta.zst
+* https://data.nextstrain.org/files/workflows/dengue/metadata_denv1.tsv.zst
+* https://data.nextstrain.org/files/workflows/dengue/sequences_denv2.fasta.zst
+* https://data.nextstrain.org/files/workflows/dengue/metadata_denv2.tsv.zst
+* https://data.nextstrain.org/files/workflows/dengue/sequences_denv3.fasta.zst
+* https://data.nextstrain.org/files/workflows/dengue/metadata_denv3.tsv.zst
+* https://data.nextstrain.org/files/workflows/dengue/sequences_denv4.fasta.zst
+* https://data.nextstrain.org/files/workflows/dengue/metadata_denv4.tsv.zst
 
 The above datasets have been preprocessed and cleaned from GenBank and are updated at regular intervals.