docs: Fix some broken external links

Those were spotted thanks to the sphinx linkcheck builder.

docs/metadata-workflow.rst

@@ -127,7 +127,7 @@ vocabulary to be useful, as with intrinsic metadata.
 The common vocabulary we chose is JSON-LD, with both CodeMeta and
 `ForgeFed's vocabulary`_ (including `ActivityStream's vocabulary`_)
 
-.. _ForgeFed's vocabulary: https://forgefed.org/vocabulary.html
+.. _ForgeFed's vocabulary: https://forgefed.org/spec/#vocab
 .. _ActivityStream's vocabulary: https://www.w3.org/TR/activitystreams-vocabulary/
 
 Instead of the four-step architecture above, the extrinsic-metadata indexer
@@ -168,7 +168,7 @@ The following sources of intrinsic metadata are supported:
 
 .. _codemeta.json: https://codemeta.github.io/terms/
 .. _pom.xml: https://maven.apache.org/pom.html
-.. _package.json: https://docs.npmjs.com/files/package.json
+.. _package.json: https://docs.npmjs.com/cli/v11/configuring-npm/package-json
 .. _PKG-INFO: https://www.python.org/dev/peps/pep-0314/
 .. _.gemspec: https://guides.rubygems.org/specification-reference/
 
@@ -178,7 +178,7 @@ Supported extrinsic metadata
 The following sources of extrinsic metadata are supported:
 
 * Codemeta documents sent by clients of :ref:`swh-deposit <swh-deposit>` (`HAL <https://hal.science/>`_, `eLife <https://elifesciences.org/>`_, `IPOL <https://www.ipol.im/>`_, ...)
-* Gitea's `"repoGet" API <https://gittea.dev/api/swagger#/repository/repoGet>`__
+* Gitea's `"repoGet" API <https://docs.gitea.com/api/1.23/#tag/repository/operation/repoGet>`__
 * GitHub's `"repo" API <https://docs.github.com/en/rest/repos/repos#get-a-repository>`__
 
 
@@ -243,7 +243,7 @@ values are simple text values. For instance, to
 These values will be automatically added to the above list of
 supported terms.
 
-.. _translate Python PKG-INFO: https://forge.softwareheritage.org/source/swh-indexer/browse/master/swh/indexer/metadata_dictionary/python.py
+.. _translate Python PKG-INFO: https://gitlab.softwareheritage.org/swh/devel/swh-indexer/-/blob/master/swh/indexer/metadata_dictionary/python.py
 
 Last step to get your code working: add a ``translate`` method that will
 take a single byte string as argument, turn it into a Python dictionary,

swh/indexer/metadata_dictionary/npm.py

@@ -37,7 +37,7 @@ class NpmMapping(JsonMapping, SingleFileIntrinsicMapping):
     }
 
     def normalize_repository(self, d):
-        """https://docs.npmjs.com/files/package.json#repository
+        """https://docs.npmjs.com/cli/v11/configuring-npm/package-json#repository
 
         >>> NpmMapping().normalize_repository({
         ...     'type': 'git',
@@ -75,7 +75,7 @@ class NpmMapping(JsonMapping, SingleFileIntrinsicMapping):
         return URIRef(url)
 
     def normalize_bugs(self, d):
-        """https://docs.npmjs.com/files/package.json#bugs
+        """https://docs.npmjs.com/cli/v11/configuring-npm/package-json#bugs
 
         >>> NpmMapping().normalize_bugs({
         ...     'url': 'https://example.org/bugs/',
@@ -100,7 +100,7 @@ class NpmMapping(JsonMapping, SingleFileIntrinsicMapping):
     )
 
     def translate_author(self, graph: Graph, root, d):
-        r"""https://docs.npmjs.com/files/package.json#people-fields-author-contributors'
+        r"""https://docs.npmjs.com/cli/v11/configuring-npm/package-json#people-fields-author-contributors'
 
         >>> from pprint import pprint
         >>> root = URIRef("http://example.org/test-software")
@@ -260,7 +260,7 @@ class NpmMapping(JsonMapping, SingleFileIntrinsicMapping):
         return Literal(description)
 
     def normalize_license(self, s):
-        """https://docs.npmjs.com/files/package.json#license
+        """https://docs.npmjs.com/cli/v11/configuring-npm/package-json#license
 
         >>> NpmMapping().normalize_license('MIT')
         rdflib.term.URIRef('https://spdx.org/licenses/MIT')
@@ -290,7 +290,7 @@ class NpmMapping(JsonMapping, SingleFileIntrinsicMapping):
             return SPDX + s
 
     def normalize_keywords(self, lst):
-        """https://docs.npmjs.com/files/package.json#homepage
+        """https://docs.npmjs.com/cli/v11/configuring-npm/package-json#homepage
 
         >>> NpmMapping().normalize_keywords(['foo', 'bar'])
         [rdflib.term.Literal('foo'), rdflib.term.Literal('bar')]