Fix generated getter and setter links

Due to an oversight, the hrefs were missing the
.html suffix and thus linked to nowhere.
2 jobs for fix-getter-links in 1 minute and 41 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Check
passed #1174338
flake8

00:01:33

failed #1174339
allowed to fail
mypy

00:01:41

 
Name Stage Failure
failed
mypy Check
gidocgen/gir/parser.py:833: error: Argument "gtype" to "Boxed" has incompatible type "Optional[GType]"; expected "GType"
gidocgen/gir/parser.py:851: error: Argument "get_type" to "GType" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:893: error: Argument "get_type" to "GType" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:915: error: Argument "name" to "Union" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:915: error: Argument "symbol_prefix" to "Union" has incompatible type "Optional[str]"; expected "str"
gidocgen/gir/parser.py:915: error: Argument "ctype" to "Union" has incompatible type "Optional[str]"; expected "str"
Found 109 errors in 3 files (checked 14 source files)
Cleaning up file based variables
ERROR: Job failed: exit code 1