Update uvicorn from broken 0.17.1

Fix issue found when testing planemo in
galaxyproject/planemo#1224 (comment) :

```
2022-04-01T14:44:05.3964452Z [2022-04-01 14:41:23 +0000] [6904] [WARNING] Invalid HTTP request received.
2022-04-01T14:44:05.3964583Z Traceback (most recent call last):
2022-04-01T14:44:05.3965087Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/uvicorn/protocols/http/h11_impl.py", line 136, in handle_events
2022-04-01T14:44:05.3965218Z     event = self.conn.next_event()
2022-04-01T14:44:05.3965652Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_connection.py", line 443, in next_event
2022-04-01T14:44:05.3965801Z     exc._reraise_as_remote_protocol_error()
2022-04-01T14:44:05.3966277Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_util.py", line 76, in _reraise_as_remote_protocol_error
2022-04-01T14:44:05.3966383Z     raise self
2022-04-01T14:44:05.3966831Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_connection.py", line 425, in next_event
2022-04-01T14:44:05.3966977Z     event = self._extract_next_receive_event()
2022-04-01T14:44:05.3967445Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_connection.py", line 367, in _extract_next_receive_event
2022-04-01T14:44:05.3967588Z     event = self._reader(self._receive_buffer)
2022-04-01T14:44:05.3968049Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_readers.py", line 73, in maybe_read_from_IDLE_client
2022-04-01T14:44:05.3968225Z     request_line_re, lines[0], "illegal request line: {!r}", lines[0]
2022-04-01T14:44:05.3968629Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_util.py", line 88, in validate
2022-04-01T14:44:05.3968781Z     raise LocalProtocolError(msg)
2022-04-01T14:44:05.3969215Z h11._util.RemoteProtocolError: illegal request line: bytearray(b'--a250a2c0546542508998e4e0ac8f1001')
2022-04-01T14:44:05.3969497Z [2022-04-01 14:41:23 +0000] [6904] [WARNING] Invalid HTTP request received.
2022-04-01T14:44:05.3969623Z Traceback (most recent call last):
2022-04-01T14:44:05.3970105Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/uvicorn/protocols/http/h11_impl.py", line 136, in handle_events
2022-04-01T14:44:05.3970231Z     event = self.conn.next_event()
2022-04-01T14:44:05.3970655Z   File "/tmp/planemo-test-workspace/gx_venv_3/lib/python3.7/site-packages/h11/_connection.py", line 423, in next_event
2022-04-01T14:44:05.3971003Z     raise RemoteProtocolError("Can't receive data when peer state is ERROR")
2022-04-01T14:44:05.3971287Z h11._util.RemoteProtocolError: Can't receive data when peer state is ERROR
```

lib/galaxy/dependencies/dev-requirements.txt

@@ -220,7 +220,7 @@ typing-extensions==4.0.1; python_version >= "3.6"
 tzlocal==2.1; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version < "4"
 ubiquerg==0.6.2
 urllib3==1.26.8; python_version >= "3.7" and python_full_version < "3.0.0" and python_version < "4" or python_full_version >= "3.6.0" and python_version < "4" and python_version >= "3.7"
-uvicorn==0.17.1; python_version >= "3.7"
+uvicorn==0.17.6; python_version >= "3.7"
 uvloop==0.16.0; python_version >= "3.7"
 vine==5.0.0; python_version >= "3.7"
 watchdog==2.1.6; python_version >= "3.6"

lib/galaxy/dependencies/pinned-requirements.txt

@@ -158,7 +158,7 @@ typing-extensions==4.0.1; python_version >= "3.6"
 tzlocal==2.1; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version < "4"
 ubiquerg==0.6.2
 urllib3==1.26.8; python_version >= "3.6" and python_full_version < "3.0.0" and python_version < "4" or python_full_version >= "3.6.0" and python_version < "4" and python_version >= "3.6"
-uvicorn==0.17.1; python_version >= "3.7"
+uvicorn==0.17.6; python_version >= "3.7"
 uvloop==0.16.0; python_version >= "3.7"
 vine==5.0.0; python_version >= "3.7"
 wcwidth==0.2.5; python_full_version >= "3.6.2" and python_version >= "3.7"